Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Timeout Configuration

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "99",
  "name": "Execute an SQL query in Microsoft SQL",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "e1d2df48-bb7f-490b-9382-b63818d2fd85",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Microsoft SQL",
      "type": "n8n-nodes-base.microsoftSql",
      "position": [
        450,
        300
      ],
      "parameters": {
        "query": "",
        "operation": "executeQuery"
      },
      "credentials": {
        "microsoftSql": ""
      },
      "typeVersion": 1,
      "id": "d4a26331-d2a3-4a0a-b28a-bc820f2f6252",
      "notes": "This microsoftSql node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-cb98988d",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Execute an SQL query in Microsoft SQL. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-ed996e69",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.794744",
    "updatedAt": "2025-09-29T07:07:49.794753",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "t...

Output:
This workflow may experience timeout issues with long-running API requests.

**Symptoms**:
- Execution hangs indefinitely
- Connection timeout errors
- ETIMEDOUT or ESOCKETTIMEDOUT errors

**Root Cause**: No timeout configured for HTTP requests, or external services are slow.

**Solutions**:

1. **Set Appropriate Timeouts**:
```json
"options": {
  "timeout": 30000  // 30 seconds
}
```

2. **Add Error Handling**:
- Use Error Trigger node to catch timeout errors
- Implement fallback logic for failed requests

3. **Use Async Patterns**:
- For long operations, use webhook callbacks
- Implement polling patterns instead of waiting

4. **Configure Node Settings**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 2000,
"continueOnFail": true
```

**Best Practice**: Set reasonable timeouts (10-30 seconds) and always have error handling for external API calls.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Empty Input Handling

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "9Or3kzIEI2tskRyR",
  "meta": {
    "instanceId": "workflow-1f21256d",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.794429",
    "updatedAt": "2025-09-29T07:07:49.794441",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Google Trend Data Extract, Summarization with Bright Data & Google Gemini",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "29e6ce01-c42f-4155-add1-8a5cfff56967",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        200,
        -420
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "6abf0439-8286-4198-9b5e-226a7bf805dc",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        200,
        -780
      ],
      "parameters": {
        "width": 400,
        "height": 300,
        "content": "## Note\n\nThis workflow deals with the structured data extraction by utilizing Bright Data Web Unlocker Product.\n\nThe Basic LLM Chain, Information Extraction, Summarization Chain are being used to demonstrate the usage of the N8N AI capabilities.\n\n**Please make sure to set the web URL of your interest within the \"Set URL and Bright Data Zone\" node and update the Webhook Notification URL**"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "6443bdea-4577-4983-adb7-0f52d6eb3825",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        620,
        -780
      ],
      "parameters": {
        "width": 480,
        "height": 300,
        "content": ...

Output:
This workflow may fail when receiving empty or null input data.

**Common Error Messages**:
- "Cannot read property 'x' of undefined"
- "No items to process"
- "Input data is empty"

**Root Cause**: The workflow doesn't handle cases where:
- Trigger receives no data
- Previous node returns empty array
- API returns null or empty response

**Solutions**:

1. **Add IF Node for Empty Check**:
```json
{
  "parameters": {
    "conditions": {
      "number": [{
        "value1": "={{ $json.length }}",
        "operation": "larger",
        "value2": 0
      }]
    }
  },
  "name": "Check Not Empty",
  "type": "n8n-nodes-base.if"
}
```

2. **Use Default Values**:
```javascript
{{ $json.field ?? "default_value" }}
{{ $json.items || [] }}
```

3. **Add Set Node with Defaults**:
- Create a Set node that provides default values
- Place it early in the workflow

4. **Implement No Match Output**:
- Many nodes have "No Match" outputs
- Use these to handle empty cases gracefully

**Best Practice**: Always validate input data and provide sensible defaults for optional fields.

Add validation for empty or null input data.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Rate Limiting Risk

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "9r4T5kELOXAV8L1F",
  "meta": {
    "instanceId": "workflow-8d6593c7",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.793194",
    "updatedAt": "2025-09-29T07:07:49.793204",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "3D Figurine Orthographic Views with Midjourney and GPT-4o-Image API",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "30ff7c89-7fb6-4daf-b7f2-d178ee702243",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        720,
        220
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "26cb9d6e-6a73-4a27-805d-8577c84101fa",
      "name": "Midjourney Generator",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        940,
        220
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "method": "POST",
        "options": {},
        "jsonBody": "{\n  \"model\": \"midjourney\",\n  \"task_type\": \"imagine\",\n  \"input\": {\n    \"prompt\": \"IP design, pop mart style, cartoon-style characters, a little girl with a red satche on her back, a pair of big eyes, long eyelashes, with pigtails, wearing a red beret, red shoes, chubby body, wearing a red and white striped dress, clean white background, crystal-clear material::5, 3D rendering, 3D modeling --ar 3:4 --niji 6\",\n    \"aspect_ratio\": \"3:2\",\n    \"process_mode\": \"turbo\",\n    \"skip_prompt_check\": false\n  }\n}",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "headerParameters": {
          "parameters": [
            {
              "name": "x-api-key"
            }
        ...

Output:
This workflow may encounter rate limiting issues when processing large batches of data.

**Common Rate Limit Errors**:
- HTTP 429 Too Many Requests
- HTTP 503 Service Unavailable
- API-specific rate limit messages

**Root Cause**: The workflow makes too many API requests in a short time period without delays.

**Solutions**:

1. **Add Wait Nodes**: Insert a Wait node between API calls
```json
{
  "parameters": {"amount": 1, "unit": "seconds"},
  "name": "Rate Limit Delay",
  "type": "n8n-nodes-base.wait"
}
```

2. **Enable Retry on Fail**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 5000
```

3. **Use Batch Processing**: Split items into smaller batches with delays

4. **Implement Exponential Backoff**: Increase wait times with each retry

**Best Practice**: Always check API documentation for rate limits and implement appropriate throttling.

Add rate limiting protection with Wait nodes and retry logic.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Rate Limiting Risk

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "A0xnegTHL43LL3eP",
  "meta": {
    "instanceId": "workflow-31041a7e",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.808417",
    "updatedAt": "2025-09-29T07:07:49.808430",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Convert YouTube Videos into SEO Blog Posts",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "c79371d9-c1be-48d4-a2c7-d97a12f4e23c",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        0,
        0
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "7812d81b-3fe8-42a0-8ac8-53161c345e60",
      "name": "Get YouTube Transcript",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        440,
        0
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "method": "POST",
        "options": {},
        "sendBody": true,
        "authentication": "{{ $credentials.genericCredentialType }}",
        "bodyParameters": {
          "parameters": [
            {
              "name": "videoUrl",
              "value": "={{ $json['YouTube Video Url'] }}"
            },
            {
              "name": "includeTimestamps",
              "value": "={{false}}"
            }
          ]
        },
        "genericAuthType": "httpHeaderAuth"
      },
      "credentials": {
        "httpBearerAuth": {
          "id": "0pq31j7wKqOIHFaR",
          "name": "Dumpling AI Bearer Auth account"
        },
        "httpHeaderAuth": {
          "id": "ASc5gIQaW1c63ZhO",
          "name": "Dumpling AI Auth"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs aut...

Output:
This workflow may encounter rate limiting issues when processing large batches of data.

**Common Rate Limit Errors**:
- HTTP 429 Too Many Requests
- HTTP 503 Service Unavailable
- API-specific rate limit messages

**Root Cause**: The workflow makes too many API requests in a short time period without delays.

**Solutions**:

1. **Add Wait Nodes**: Insert a Wait node between API calls
```json
{
  "parameters": {"amount": 1, "unit": "seconds"},
  "name": "Rate Limit Delay",
  "type": "n8n-nodes-base.wait"
}
```

2. **Enable Retry on Fail**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 5000
```

3. **Use Batch Processing**: Split items into smaller batches with delays

4. **Implement Exponential Backoff**: Increase wait times with each retry

**Best Practice**: Always check API documentation for rate limits and implement appropriate throttling.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Disconnected Node

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "AnbedV2Ntx97sfed",
  "meta": {
    "instanceId": "workflow-f6b2611b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.813211",
    "updatedAt": "2025-09-29T07:07:49.813221",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Extract & Summarize Bing Copilot Search Results with Gemini AI and Bright Data",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "5f358132-63bd-4c66-80da-4fb9911f607f",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -1140,
        400
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "43a157f6-2fb8-4c90-bf5d-92fc64c9df10",
      "name": "Google Gemini Chat Model",
      "type": "n8n-nodes-base.noOp",
      "notes": "Gemini Experimental Model",
      "position": [
        760,
        580
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-2.0-flash-thinking-exp-01-21"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "YeO7dHZnuGBVQKVZ",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "notesInFlow": true,
      "typeVersion": 1
    },
    {
      "id": "f2d34617-ea34-4163-b9d5-a35fed807dbb",
      "name": "Default Data Loader",
      "type": "n8n-nodes-base.noOp",
      "position": [
        940,
        580
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This documentDefaultDataLoader node performs automated tasks as part of the workflow."
    },
    {
      "id": "707fdb4a-f534-4984-b97d-1839db1afc03",
      "name": "Recursive Character Text Splitter",
      "type": "...

Output:
The workflow has a broken data flow. The node '43a157f6-2fb8-4c90-bf5d-92fc64c9df10' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for '43a157f6-2fb8-4c90-bf5d-92fc64c9df10'.

**Impact**: Data from '43a157f6-2fb8-4c90-bf5d-92fc64c9df10' will not flow to any downstream nodes, effectively stopping the workflow at this point.

**Solution**:
1. Open the workflow in the n8n editor
2. Draw a connection from '43a157f6-2fb8-4c90-bf5d-92fc64c9df10' to the next node in the flow
3. Verify the connection appears in the connections object

**Programmatic Fix**: Add the connection back to the workflow JSON:
```json
"connections": {
  "43a157f6-2fb8-4c90-bf5d-92fc64c9df10": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect '43a157f6-2fb8-4c90-bf5d-92fc64c9df10' to the workflow.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Timeout Configuration

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-8e6ff1ac",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.827081",
    "updatedAt": "2025-09-29T07:07:49.827094",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "40bb5497-d1d2-4eb7-b683-78b88c8d9230",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        496.83478320435574,
        520
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "url",
          "value": "{{ $env.WEBHOOK_URL }}"
        },
        "options": {},
        "operation": "download"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "{{ $credentials.googleDriveOAuth2Api.id }}",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 3,
      "notes": "This googleDrive node performs automated tasks as part of the workflow."
    },
    {
      "id": "1323d520-1528-4a5a-9806-8f4f45306098",
      "name": "Recursive Character Text Splitter",
      "type": "n8n-nodes-base.noOp",
      "position": [
        996.8347832043557,
        920
      ],
      "parameters": {
        "chunkSize": 3000,
        "chunkOverlap": 200
      },
      "typeVersion": 1,
      "notes": "This textSplitterRecursiveCharacterTextSplitter node performs automated tasks as part of the workflow."
    },
    {
      "id": "796b155a-64e6-4a52-9168-a37c68077d99",
      "name": "Embeddings OpenAI",
      "type": "n8n-nodes-base.noOp",
      "position": [
        836.8347832043557,
        740
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "JCgD7807AQpe8Xge",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This embeddingsOpenAi node performs automated tasks as part of t...

Output:
This workflow may experience timeout issues with long-running API requests.

**Symptoms**:
- Execution hangs indefinitely
- Connection timeout errors
- ETIMEDOUT or ESOCKETTIMEDOUT errors

**Root Cause**: No timeout configured for HTTP requests, or external services are slow.

**Solutions**:

1. **Set Appropriate Timeouts**:
```json
"options": {
  "timeout": 30000  // 30 seconds
}
```

2. **Add Error Handling**:
- Use Error Trigger node to catch timeout errors
- Implement fallback logic for failed requests

3. **Use Async Patterns**:
- For long operations, use webhook callbacks
- Implement polling patterns instead of waiting

4. **Configure Node Settings**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 2000,
"continueOnFail": true
```

**Best Practice**: Set reasonable timeouts (10-30 seconds) and always have error handling for external API calls.

Configure appropriate timeouts and error handling for HTTP requests.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Syntax Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id" "BXfxO6faULfsy2JN",
  "meta": {
    "instanceId": "workflow-3689a9f4",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.846183",
    "updatedAt": "2025-09-29T07:07:49.846196",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Scrape Today's Github Trend 13 Top Repositories",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "e2981cad-c09b-46ee-b2db-cb007a95c4a1",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        0,
        0
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "990de0c9-f540-4a10-8a1a-63a0526444ff",
      "name": "Extract Box",
      "type": "n8n-nodes-base.html",
      "position": [
        440,
        0
      ],
      "parameters": {
        "options": {},
        "operation": "extractHtmlContent",
        "extractionValues": {
          "values": [
            {
              "key": "YOUR_CREDENTIAL_HERE",
              "cssSelector": "div.Box",
              "returnValue": "html"
            }
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "This html node performs automated tasks as part of the workflow."
    },
    {
      "id": "7f7968ce-3935-488e-98f9-7ddd270d14b0",
      "name": "Request to Github Trend",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        220,
        0
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "87cd7fa1-d896-49a3-9336-17663ca522aa",
      "name": "Turn to a...

Output: The JSON is missing a colon between a key and its value. JSON requires colons to separate keys from values.

Add the missing colon after the property name.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Data Type Mismatch

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-40f54075",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.858755",
    "updatedAt": "2025-09-29T07:07:49.858765",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "296a935f-bd02-44bc-9e1e-3e4d6a307e38",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        260,
        240
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "61a38c00-f196-4b01-9274-c5e0f4c511bc",
      "name": "Embeddings OpenAI",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1060,
        460
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "VQtv7frm7eLiEDnd",
          "name": "OpenAi account 7"
        }
      },
      "typeVersion": 1,
      "notes": "This embeddingsOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "816066bd-02e8-4de2-bcee-ab81d890435a",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        426.9261940355327,
        60.389291053299075
      ],
      "parameters": {
        "color": 7,
        "width": 1086.039382705461,
        "height": 728.4168721167887,
        "content": "## 1. Setup: Fetch file from Google Drive, split it into chunks and insert into a vector database\nNote that running this part multiple times will insert multiple copies into your DB",
        "_injected_number_field": "not_a_number"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "30cd81ad-d658-4c33-9a38-68e33b74cdae",
      "name": "Default Data...

Output:
The node 'Sticky Note' has a data type mismatch in its parameters.

**Issue**: A field expected a number but received a string value.

**Common Causes**:
1. Expression returns string instead of number
2. JSON parsing preserves string types for numeric values
3. Upstream node outputs different data types than expected

**Solutions**:

1. **Type Conversion in Expression**:
```javascript
// Convert string to number
{ parseInt($json.stringValue) }
{ parseFloat($json.decimalString) }
{ Number($json.value) }
```

2. **Use Code Node for Transformation**:
```javascript
return items.map(item => {
  item.json.numericField = Number(item.json.stringField);
  return item;
});
```

3. **Validate Data Types**:
- Use IF node to check types before processing
- Add error handling for invalid types

**Best Practice**: Always validate and transform data types explicitly when passing data between nodes.

Fix data type conversion in 'Sticky Note'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Timeout Configuration

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        260,
        210
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "node-5b8ccfaf"
    },
    {
      "name": "Fetch new followers",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        460,
        210
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "authentication": "{{ $credentials.headerAuth }}"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "{{ $credentials.httpHeaderAuth.id }}",
          "name": "Twitter Token"
        }
      },
      "typeVersion": 1,
      "id": "node-35dc31e9"
    },
    {
      "name": "Item Lists",
      "type": "n8n-nodes-base.itemLists",
      "position": [
        660,
        210
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "data"
      },
      "typeVersion": 1,
      "id": "node-65976655"
    },
    {
      "name": "Function",
      "type": "n8n-nodes-base.function",
      "position": [
        1660,
        210
      ],
      "parameters": {
        "functionCode": "const binary = {};\nfor (let i=0; i < items.length; i++) {\n binary[`data${i}`] = items[i].binary.avatar;\n}\n\nreturn [\n {\n json: {\n numIcons: items.length,\n },\n binary,\n }\n];\n"
      },
      "typeVersion": 1,
      "id": "node-e9563a89"
    },
    {
      "name": "Merge",
      "type": "n8n-nodes-base.merge",
      "position": [
        1910,
        110
      ],
      "parameters": {
        "mode": "mergeByIndex"
      },
      "typeVersion": 1,
      "id": "node-42968e64"
    },
    {
      "name": "Fetching images",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        860,
        210
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "responseFormat": "file",
        "dataPropertyName": "avatar"
      ...

Output:
This workflow may experience timeout issues with long-running API requests.

**Symptoms**:
- Execution hangs indefinitely
- Connection timeout errors
- ETIMEDOUT or ESOCKETTIMEDOUT errors

**Root Cause**: No timeout configured for HTTP requests, or external services are slow.

**Solutions**:

1. **Set Appropriate Timeouts**:
```json
"options": {
  "timeout": 30000  // 30 seconds
}
```

2. **Add Error Handling**:
- Use Error Trigger node to catch timeout errors
- Implement fallback logic for failed requests

3. **Use Async Patterns**:
- For long operations, use webhook callbacks
- Implement polling patterns instead of waiting

4. **Configure Node Settings**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 2000,
"continueOnFail": true
```

**Best Practice**: Set reasonable timeouts (10-30 seconds) and always have error handling for external API calls.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Rate Limiting Risk

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "EWIrJ8e9z7AijmTu",
  "meta": {
    "instanceId": "workflow-8cc96b69",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.907257",
    "updatedAt": "2025-09-29T07:07:49.907275",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Lead Generation System (Template)",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "03eabaeb-ad13-4764-98de-183325e32cbd",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        160,
        -80
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "e7df072c-fba8-4dc2-94ce-ae20a135a633",
      "name": "Edit Fields",
      "type": "n8n-nodes-base.set",
      "position": [
        840,
        -80
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "ab7e33d5-986e-4fba-b4d0-bc47bcd1cf82",
              "name": "first_name",
              "type": "string",
              "value": "={{ $json.first_name }}"
            },
            {
              "id": "f29e8cf7-3cd0-4ffc-a071-96be9dd1da50",
              "name": "last_name",
              "type": "string",
              "value": "={{ $json.last_name }}"
            },
            {
              "id": "54ee5cec-ccaf-4f34-8030-d17206abef5d",
              "name": "email",
              "type": "string",
              "value": "={{ $json.email }}"
            },
            {
              "id": "daf1fa7c-a7fc-4b96-8184-a5569b9ab9a0",
              "name": "email_status",
              "type": "string",
              "value": "={{ $json.email_status }}"
            },
            {
         ...

Output:
This workflow may encounter rate limiting issues when processing large batches of data.

**Common Rate Limit Errors**:
- HTTP 429 Too Many Requests
- HTTP 503 Service Unavailable
- API-specific rate limit messages

**Root Cause**: The workflow makes too many API requests in a short time period without delays.

**Solutions**:

1. **Add Wait Nodes**: Insert a Wait node between API calls
```json
{
  "parameters": {"amount": 1, "unit": "seconds"},
  "name": "Rate Limit Delay",
  "type": "n8n-nodes-base.wait"
}
```

2. **Enable Retry on Fail**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 5000
```

3. **Use Batch Processing**: Split items into smaller batches with delays

4. **Implement Exponential Backoff**: Increase wait times with each retry

**Best Practice**: Always check API documentation for rate limits and implement appropriate throttling.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Data Type Mismatch

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-3a72014b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.911204",
    "updatedAt": "2025-09-29T07:07:49.911216",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "192d3e4f-6bb0-4b87-a1fa-e32c9efb49cc",
      "name": "When clicking \"Test workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        336,
        34
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "32a7a772-76a6-4614-a6ab-d2b152a5811f",
      "name": "OpenAI Chat Model1",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1220,
        180
      ],
      "parameters": {
        "model": "gpt-4o",
        "options": {
          "temperature": 0
        }
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "8c444314-ed7d-4ca0-b0fa-b6d1e964c698",
      "name": "Get Applicable Rows",
      "type": "n8n-nodes-base.airtable",
      "position": [
        516,
        34
      ],
      "parameters": {
        "base": {
          "__rl": true,
          "mode": "list",
          "value": "appbgxPBurOmQK3E7",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "Building Inventory Survey Example"
        },
        "table": {
          "__rl": true,
          "mode": "id",
          "value": "tblEHkoTvKpa4Aa0Q"
        },
        "options": {},
        "operation": "search",
        "returnAll": false,
        "filterByFormula": "AND(Image!=\"\", AI_status=FALSE())"
      },
      "credential...

Output:
The node 'Fallback Response' has a data type mismatch in its parameters.

**Issue**: A field expected a number but received a string value.

**Common Causes**:
1. Expression returns string instead of number
2. JSON parsing preserves string types for numeric values
3. Upstream node outputs different data types than expected

**Solutions**:

1. **Type Conversion in Expression**:
```javascript
// Convert string to number
{ parseInt($json.stringValue) }
{ parseFloat($json.decimalString) }
{ Number($json.value) }
```

2. **Use Code Node for Transformation**:
```javascript
return items.map(item => {
  item.json.numericField = Number(item.json.stringField);
  return item;
});
```

3. **Validate Data Types**:
- Use IF node to check types before processing
- Add error handling for invalid types

**Best Practice**: Always validate and transform data types explicitly when passing data between nodes.

Fix data type conversion in 'Fallback Response'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Expression Reference Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "H95uJY2gjSOsxRps",
  "meta": {
    "instanceId": "workflow-0de94488",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.909299",
    "updatedAt": "2025-09-29T07:07:49.909307",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Extract Amazon Best Seller Electronic Information with Bright Data and Google Gemini",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "328c84bb-eef0-41cc-a392-8e58e3599f9b",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        340,
        -440
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "b0e35bc1-473f-44b7-8959-9683adabb8b7",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        820,
        -640
      ],
      "parameters": {
        "width": 420,
        "height": 140,
        "content": "## LLM Usages\n\nGoogle Gemini Flash Exp model is being used.\n\nInformation Extraction for building the structured data"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "a0f32fbd-a7d0-4aeb-b930-59480066e87b",
      "name": "Google Gemini Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1088,
        -220
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-2.0-flash-exp"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "YeO7dHZnuGBVQKVZ",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatGoogleGemini node performs autom...

Output:
In node 'Webhook Notifier for structured data extractor', the parameter 'url' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json["non_existent_field"] }}`
**Original Value**: `{{ $env.WEBHOOK_URL }}`

**Root Cause**: The expression references a field, node, or variable that doesn't exist in the data flow.

**Debugging Steps**:
1. Check the output of previous nodes to verify available fields
2. Use the Expression Editor to test expressions interactively
3. Add a Set node before this one to inspect available data
4. Use optional chaining for potentially undefined fields: `$json.field?.subfield`

**Best Practice**: Always validate data availability before using expressions.

Fix the expression in 'Webhook Notifier for structured data extractor' parameter 'url'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Expression Reference Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "FDl4Ho3KYiA7MIxR",
  "meta": {
    "instanceId": "workflow-8ef4a796",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.912868",
    "updatedAt": "2025-09-29T07:07:49.912880",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "NetSuite Rest API workflow",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "f7f90fb4-e29f-4bbf-a99d-ee2fde45cd06",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -380,
        -40
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "9fcc1ce7-e9bf-4592-8bcd-7c77272a9c59",
      "name": "NetSuite",
      "type": "n8n-nodes-netsuite.netsuite",
      "position": [
        -40,
        -180
      ],
      "parameters": {
        "query": "={{ $node.NonExistentNode.json.data }}",
        "options": {},
        "operation": "runSuiteQL"
      },
      "credentials": {
        "netsuite": {
          "id": "ro6Rl1oWY4KkFUYn",
          "name": "NetSuite account"
        }
      },
      "typeVersion": 1,
      "notes": "This netsuite node performs automated tasks as part of the workflow."
    },
    {
      "id": "1d615309-2cb0-4383-9698-2f80da0d4bf5",
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -380,
        -280
      ],
      "webhookId": "249328cc-587a-4269-b266-96fe60cfaeb9",
      "parameters": {
        "path": "249328cc-587a-4269-b266-96fe60cfaeb9",
        "options": {},
        "responseData": "allEntries",
        "responseMode": "lastNode"
      },
      "typeVersion": 2,
      "notes": "This webhook node performs automated tasks as part of the workflow."
    ...

Output:
In node 'NetSuite', the parameter 'query' contains an expression that references undefined data.

**Faulty Expression**: `={{ $node.NonExistentNode.json.data }}`
**Original Value**: `={{ $json.query.suiteql }}`

**Root Cause**: The expression references a field, node, or variable that doesn't exist in the data flow.

**Debugging Steps**:
1. Check the output of previous nodes to verify available fields
2. Use the Expression Editor to test expressions interactively
3. Add a Set node before this one to inspect available data
4. Use optional chaining for potentially undefined fields: `$json.field?.subfield`

**Best Practice**: Always validate data availability before using expressions.

Fix the expression in 'NetSuite' parameter 'query'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Empty Input Handling

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "GcSlNHOnN39cPhRA",
  "meta": {
    "instanceId": "workflow-79dac422",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.908564",
    "updatedAt": "2025-09-29T07:07:49.908583",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Google Search Engine Results Page Extraction with Bright Data",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "c40156b9-b7ba-449b-8362-f8b8cd27a36d",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        200,
        -440
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "d98ae28e-a94f-43a1-9bfe-362adbc61c69",
      "name": "Google Gemini Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        960,
        -240
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-2.0-flash-exp"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "YeO7dHZnuGBVQKVZ",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatGoogleGemini node performs automated tasks as part of the workflow."
    },
    {
      "id": "984acfe6-acd7-4817-b2d5-6d2aab511bae",
      "name": "Summarization Chain",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1320,
        -440
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 2,
      "notes": "This chainSummarization node performs automated tasks as part of the workflow."
    },
    {
      "id": "6b5e26bf-8802-40d4-bc44-62c086c00f7c",
      "name": "Google Gemini Chat Model For Summarization",
      "type": "n8...

Output:
This workflow may fail when receiving empty or null input data.

**Common Error Messages**:
- "Cannot read property 'x' of undefined"
- "No items to process"
- "Input data is empty"

**Root Cause**: The workflow doesn't handle cases where:
- Trigger receives no data
- Previous node returns empty array
- API returns null or empty response

**Solutions**:

1. **Add IF Node for Empty Check**:
```json
{
  "parameters": {
    "conditions": {
      "number": [{
        "value1": "={{ $json.length }}",
        "operation": "larger",
        "value2": 0
      }]
    }
  },
  "name": "Check Not Empty",
  "type": "n8n-nodes-base.if"
}
```

2. **Use Default Values**:
```javascript
{{ $json.field ?? "default_value" }}
{{ $json.items || [] }}
```

3. **Add Set Node with Defaults**:
- Create a Set node that provides default values
- Place it early in the workflow

4. **Implement No Match Output**:
- Many nodes have "No Match" outputs
- Use these to handle empty cases gracefully

**Best Practice**: Always validate input data and provide sensible defaults for optional fields.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Empty Input Handling

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-ffccf5a1",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.935076",
    "updatedAt": "2025-09-29T07:07:49.935110",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "141638a4-b340-473f-a800-be7dbdcff131",
      "name": "When clicking \"Test workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        695,
        380
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "6ccdaca5-f620-4afa-bed6-92f3a450687d",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        875,
        380
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "list",
          "value": "0B43u2YYOTJR2cC1BRkptZ3N4QTk4NEtxRko5cjhKUUFyemw0",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "0B0A0255.jpeg"
        },
        "options": {},
        "operation": "download"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "yOwz41gMQclOadgu",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 3,
      "notes": "This googleDrive node performs automated tasks as part of the workflow."
    },
    {
      "id": "b0c2f7a4-a336-4705-aeda-411f2518aaef",
      "name": "Get Color Information",
      "type": "n8n-nodes-base.editImage",
      "position": [
        1200,
        200
      ],
      "parameters": {
        "operation": "information"
      },
      "typeVersion": 1,
      "notes": "This editImage node performs automated tasks as part of the workflow."
    },
    {
      "id": "3e42b3f1-6900-4622-8c0d-2d9a27a7e1c9",
      "name": "Resize Image",
      "type": "n8n-nodes-base.edit...

Output:
This workflow may fail when receiving empty or null input data.

**Common Error Messages**:
- "Cannot read property 'x' of undefined"
- "No items to process"
- "Input data is empty"

**Root Cause**: The workflow doesn't handle cases where:
- Trigger receives no data
- Previous node returns empty array
- API returns null or empty response

**Solutions**:

1. **Add IF Node for Empty Check**:
```json
{
  "parameters": {
    "conditions": {
      "number": [{
        "value1": "={{ $json.length }}",
        "operation": "larger",
        "value2": 0
      }]
    }
  },
  "name": "Check Not Empty",
  "type": "n8n-nodes-base.if"
}
```

2. **Use Default Values**:
```javascript
{{ $json.field ?? "default_value" }}
{{ $json.items || [] }}
```

3. **Add Set Node with Defaults**:
- Create a Set node that provides default values
- Place it early in the workflow

4. **Implement No Match Output**:
- Many nodes have "No Match" outputs
- Use these to handle empty cases gracefully

**Best Practice**: Always validate input data and provide sensible defaults for optional fields.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Data Type Mismatch

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "IXumIzS9WtPAhKFX",
  "meta": {
    "instanceId": "workflow-66e98c6b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.960505",
    "updatedAt": "2025-09-29T07:07:49.960518",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Export Zammad Objects Users, Roles, Groups and Organizations to Excel",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "59b12a25-d90f-47f0-a043-a51f71f5761e",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -120,
        -80
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "259acda6-75be-4011-b021-56321ab10478",
      "name": "Zammad Univeral User Object",
      "type": "n8n-nodes-base.set",
      "position": [
        600,
        -80
      ],
      "parameters": {
        "values": {
          "number": [
            {
              "name": "user_id",
              "value": "={{ $json.id }}"
            },
            {
              "name": "organization_id",
              "value": "={{ $json.organization_id }}"
            }
          ],
          "string": [
            {
              "name": "email",
              "value": "={{ $json.email }}"
            },
            {
              "name": "firstname",
              "value": "={{ $json.firstname }}"
            },
            {
              "name": "lastname",
              "value": "={{ $json.lastname }}"
            },
            {
              "name": "role_ids",
              "value": "={{ $json.role_ids.join() }}\n"
            },
            {
              "name": "groups",
              "value": "={{ $json.group_ids }}"
            }
     ...

Output:
The node 'Convert to Excel Roles' has a data type mismatch in its parameters.

**Issue**: A field expected a number but received a string value.

**Common Causes**:
1. Expression returns string instead of number
2. JSON parsing preserves string types for numeric values
3. Upstream node outputs different data types than expected

**Solutions**:

1. **Type Conversion in Expression**:
```javascript
// Convert string to number
{ parseInt($json.stringValue) }
{ parseFloat($json.decimalString) }
{ Number($json.value) }
```

2. **Use Code Node for Transformation**:
```javascript
return items.map(item => {
  item.json.numericField = Number(item.json.stringField);
  return item;
});
```

3. **Validate Data Types**:
- Use IF node to check types before processing
- Add error handling for invalid types

**Best Practice**: Always validate and transform data types explicitly when passing data between nodes.

Fix data type conversion in 'Convert to Excel Roles'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Syntax Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id" "IjQRdNu2ItwNnGL2",
  "meta": {
    "instanceId": "workflow-a09839ad",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.958946",
    "updatedAt": "2025-09-29T07:07:49.958958",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "[hiroshidigital.com] Send Message In Larksuite",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "9fd838b3-18f7-4056-bbb9-8a9fd843590b",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        220
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "7afa44a2-28ec-4e3d-a8bd-a63721648eb2",
      "name": "Get Lark Token",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        640,
        220
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n  \"app_id\": \"{{ $json.app_id }}\",\n  \"app_secret\": \"{{ $json.app_secret }}\"\n} ",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "headerParameters": {
          "parameters": [
            {
              "name": "Content-Type",
              "value": "application/json"
            }
          ]
        }
      },
      "typeVersion": 4.1,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "4e1fdbef-b881-445c-90ce-95bc9b745772",
      "name": "Input",
      "type": "n8n-nodes-base.set",
      "position": [
        440,
        220
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
...

Output: The JSON is missing a colon between a key and its value. JSON requires colons to separate keys from values.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Rate Limiting Risk

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-5cab9ad0",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.971578",
    "updatedAt": "2025-09-29T07:07:49.971680",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "abccacce-bbdc-428e-94e0-19996c5bfe02",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1720,
        160
      ],
      "parameters": {
        "color": 7,
        "width": 319.5392879244982,
        "height": 218.88813194060202,
        "content": "### AI agent that can scrape webpages\nRemake of {{ $env.WEBHOOK_URL }}\n\n**Changes**:\n* Replaces Execute Workflow Tool and Subworkflow\n* Replaces Response Formatting"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "9fc05c79-5a2d-4ac4-a4f5-32b9c1b385e1",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1340,
        340
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "45c9bdaf-d51e-4026-8911-4b04c5473b06",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1720,
        560
      ],
      "parameters": {
        "color": 7,
        "width": 365.9021913627245,
        "height": 245.35379866205295,
        "content": "### Allow your AI to call an API to fetch data\nRemake of {{ $env.API_BASE_URL }}\n\n**Changes**:\n* Replaces Execute Workflow Tool and Subworkflow\n* Replaces Manual Query Params Definitions\n* Replaces Response Fo...

Output:
This workflow may encounter rate limiting issues when processing large batches of data.

**Common Rate Limit Errors**:
- HTTP 429 Too Many Requests
- HTTP 503 Service Unavailable
- API-specific rate limit messages

**Root Cause**: The workflow makes too many API requests in a short time period without delays.

**Solutions**:

1. **Add Wait Nodes**: Insert a Wait node between API calls
```json
{
  "parameters": {"amount": 1, "unit": "seconds"},
  "name": "Rate Limit Delay",
  "type": "n8n-nodes-base.wait"
}
```

2. **Enable Retry on Fail**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 5000
```

3. **Use Batch Processing**: Split items into smaller batches with delays

4. **Implement Exponential Backoff**: Increase wait times with each retry

**Best Practice**: Always check API documentation for rate limits and implement appropriate throttling.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Missing Credentials

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "IwOOVikQC7cn9VTv",
  "meta": {
    "instanceId": "workflow-0fcd21f5",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.963089",
    "updatedAt": "2025-09-29T07:07:49.963099",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Email verification with Icypeas (single)",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "83105cfd-9107-4dae-8282-07c6594ebbd2",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        1460,
        460
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "7146ee71-e4fc-4c1f-bdbd-af1466525fef",
      "name": "Run email verification (single)",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        2180,
        460
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "method": "POST",
        "options": {},
        "sendBody": true,
        "sendHeaders": true,
        "authentication": "{{ $credentials.genericCredentialType }}",
        "bodyParameters": {
          "parameters": [
            {
              "name": "email",
              "value": "=uyqsdqkudhfiqudhfiqduhfiqdhfqif@gmail.com"
            }
          ]
        },
        "genericAuthType": "httpHeaderAuth",
        "headerParameters": {
          "parameters": [
            {
              "name": "X-ROCK-TIMESTAMP",
              "value": "={{ $json.api.timestamp }}"
            }
          ]
        }
      },
      "typeVersion": 4.1,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "1e004997-dfc6-45ad-9351-9a096cb4c991",
      "name": "Sticky Note",
   ...

Output:
The node 'Run email verification (single)' (type: n8n-nodes-base.httpRequest) requires credentials but the 'credentials' configuration is missing.

**Root Cause**: The credentials object was not defined for this node.

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "httpHeaderAuth": {
    "id": "KGXtUrqC6lNLwW2w",
    "name": "Header Auth account"
  }
}
```

**Best Practice**: Always verify credentials are properly configured before deploying workflows. Use n8n's credential management system to store sensitive data securely.

Add credentials configuration to the 'Run email verification (single)' node.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Expression Reference Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "IwOOVikQC7cn9VTv",
  "meta": {
    "instanceId": "workflow-36f9e6f2",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.987692",
    "updatedAt": "2025-09-29T07:07:49.987726",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Perform a domain search (single) with Icypeas",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "a8be94cc-c695-4a24-b045-d6716fe6f043",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        4360,
        1720
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "c636d4ed-6310-4f2a-876e-c24d54dc9349",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        4200,
        1460
      ],
      "parameters": {
        "height": 243.6494382022472,
        "content": "## Perform a domain search (single) with Icypeas\n\nThis workflow demonstrates how to perform a domain scan using Icypeas. Visit {{ $env.WEBHOOK_URL }} to create your account.\n\n\n"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "a6f4dbe2-478d-426c-b544-60cd97c84901",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        4507,
        1536
      ],
      "parameters": {
        "width": 506,
        "height": 1041.5303370786517,
        "content": "## Authenticates to your Icypeas account\n\nThis code node utilizes your API key, API secret, and User ID to establish a connection with your Icypeas account.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nOpen this node and insert your API Key, API s...

Output:
In node 'Run domain scan (single)', the parameter 'method' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json.deeply.nested.undefined.path }}`
**Original Value**: `POST`

**Root Cause**: The expression references a field, node, or variable that doesn't exist in the data flow.

**Debugging Steps**:
1. Check the output of previous nodes to verify available fields
2. Use the Expression Editor to test expressions interactively
3. Add a Set node before this one to inspect available data
4. Use optional chaining for potentially undefined fields: `$json.field?.subfield`

**Best Practice**: Always validate data availability before using expressions.

Fix the expression in 'Run domain scan (single)' parameter 'method'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Timeout Configuration

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "Jy1RMuri0WJO5aO4",
  "meta": {
    "instanceId": "workflow-d1551dce",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.992474",
    "updatedAt": "2025-09-29T07:07:49.992488",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Summarize Google Drive Documents with Mistral AI and Send via Gmail",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "680f9002-94fa-48c1-af5f-d2a5305b6291",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        0,
        0
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "3fa4ad1a-ce87-44db-b016-bd172c2318eb",
      "name": "Mistral Cloud Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        500,
        240
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "mistralCloudApi": {
          "id": "temjibUluGywOSoS",
          "name": "Mistral Cloud account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatMistralCloud node performs automated tasks as part of the workflow."
    },
    {
      "id": "124d62ae-3b46-4e75-a04e-155849fe280d",
      "name": "Download uploaded File from Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        220,
        0
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "list",
          "value": "1d0njBA2ZM0zYyJOEbUeFwQmHSYIO7IM2",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "Goods and Services Receipt(WCC).pdf"
        },
        "options": {},
        "operation": "download"
      },
     ...

Output:
This workflow may experience timeout issues with long-running API requests.

**Symptoms**:
- Execution hangs indefinitely
- Connection timeout errors
- ETIMEDOUT or ESOCKETTIMEDOUT errors

**Root Cause**: No timeout configured for HTTP requests, or external services are slow.

**Solutions**:

1. **Set Appropriate Timeouts**:
```json
"options": {
  "timeout": 30000  // 30 seconds
}
```

2. **Add Error Handling**:
- Use Error Trigger node to catch timeout errors
- Implement fallback logic for failed requests

3. **Use Async Patterns**:
- For long operations, use webhook callbacks
- Implement polling patterns instead of waiting

4. **Configure Node Settings**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 2000,
"continueOnFail": true
```

**Best Practice**: Set reasonable timeouts (10-30 seconds) and always have error handling for external API calls.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Missing Credentials

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "KWFLpcJytH7qjheD",
  "meta": {
    "instanceId": "workflow-fd888392",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.977958",
    "updatedAt": "2025-09-29T07:07:49.977973",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "(Not published) Three-View Orthographic Projection to Dynamic Video Conversion",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "442e12af-531d-4000-9e74-d9bfaa3515ca",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -1960,
        -160
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "39c46540-7dee-4237-921e-3b6bd9821302",
      "name": "Generate Kling Video",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -400,
        0
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n    \"model\": \"kling\",\n    \"task_type\": \"video_generation\",\n    \"input\": {\n        \"version\": \"1.6\",\n        \"mode\": \"pro\",\n        \"image_url\": \"{{ $('Get Image URL of Front Image').item.json.image_url }}\",\n        \"image_tail_url\": \"{{ $json.image_url }}\",\n        \"duration\":5,\n        \"prompt\": \"The character rotates smoothly, stay original facial expression. Apply anticlockwise rotation\"\n    }\n} ",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "headerParameters": {
          "parameters": [
            {
              "name": "x-api-key",
              "value": "={{ $('Basic Params').item.json[\"x-api-key\"] }}"
            }
       ...

Output:
The node 'GPT-4o Generator: Front View' (type: n8n-nodes-base.httpRequest) requires credentials but the 'credentials' configuration is missing.

**Root Cause**: The credentials object was not defined for this node.

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "httpHeaderAuth": {
    "id": "fsJeCNd9BkJ1CIrt",
    "name": "Header Auth account 2"
  }
}
```

**Best Practice**: Always verify credentials are properly configured before deploying workflows. Use n8n's credential management system to store sensitive data securely.

Add credentials configuration to the 'GPT-4o Generator: Front View' node.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Missing Credentials

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "MIA4ozGH71fC3KCe",
  "meta": {
    "instanceId": "workflow-f817da8b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.003458",
    "updatedAt": "2025-09-29T07:07:50.003515",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "pdf to text",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "d92f690d-c84d-451d-9ab8-da6f9356e0ca",
      "name": "Convert PDF into Text",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -120,
        100
      ],
      "parameters": {},
      "credentials": {
        "customJsApi": {
          "id": "h29wo2anYKdANAzm",
          "name": "CustomJS account"
        }
      },
      "typeVersion": 1,
      "notes": "This PdfToText node performs automated tasks as part of the workflow."
    },
    {
      "id": "420cfac7-a621-4bf3-bd34-3fee569321e4",
      "name": "HTML to PDF",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -340,
        100
      ],
      "parameters": {
        "htmlInput": "
Hello World
"
      },
      "credentials": {
        "customJsApi": {
          "id": "h29wo2anYKdANAzm",
          "name": "CustomJS account"
        }
      },
      "typeVersion": 1,
      "notes": "This html2Pdf node performs automated tasks as part of the workflow."
    },
    {
      "id": "83c05ec3-1225-41d0-b5b4-f9f6be7619ea",
      "name": "Convert PDF into Text1",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -120,
        300
      ],
      "parameters": {
        "resource": "url",
        "field_name": "={{ $json.path }}"
      },
      "typeVersion": 1,
      "notes": "This PdfToText node performs automated tasks as part of the workflow."
    },
    {
      "id": "787e9369-abb5-483e-ba43-8837b5c586f9",
      "name": "Code",
      "type": "n8n-nodes-b...

Output:
The node 'Convert PDF into Text1' (type: n8n-nodes-base.noOp) requires credentials but the 'credentials' configuration is missing.

**Root Cause**: The credentials object was not defined for this node.

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "customJsApi": {
    "id": "h29wo2anYKdANAzm",
    "name": "CustomJS account"
  }
}
```

**Best Practice**: Always verify credentials are properly configured before deploying workflows. Use n8n's credential management system to store sensitive data securely.

Add credentials configuration to the 'Convert PDF into Text1' node.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Data Type Mismatch

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "MKGrRFnUuMZMAxNf",
  "meta": {
    "instanceId": "workflow-ab646b1d",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.010785",
    "updatedAt": "2025-09-29T07:07:50.010797",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Scrape Latest 20 TechCrunch Articles",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "f757df19-a2b0-42c5-b75e-e4af51696059",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -400,
        160
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "1311d3be-cf2e-42ca-ae69-8ebfeb71eefb",
      "name": "Request Techcrunsh Latest Page",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -220,
        160
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "c7807fdf-3b0b-40f8-b912-214475501861",
      "name": "Parse a posts box",
      "type": "n8n-nodes-base.html",
      "position": [
        -40,
        160
      ],
      "parameters": {
        "options": {},
        "operation": "extractHtmlContent",
        "extractionValues": {
          "values": [
            {
              "key": "YOUR_CREDENTIAL_HERE",
              "cssSelector": "ul.wp-block-post-template",
              "returnValue": "html"
            }
          ]
        },
        "_injected_number_field": "not_a_number"
      },
      "typeVersion": 1.2,
      "notes": "This html node performs automated tasks as part of the workflow."
    },
    ...

Output:
The node 'Parse a posts box' has a data type mismatch in its parameters.

**Issue**: A field expected a number but received a string value.

**Common Causes**:
1. Expression returns string instead of number
2. JSON parsing preserves string types for numeric values
3. Upstream node outputs different data types than expected

**Solutions**:

1. **Type Conversion in Expression**:
```javascript
// Convert string to number
{ parseInt($json.stringValue) }
{ parseFloat($json.decimalString) }
{ Number($json.value) }
```

2. **Use Code Node for Transformation**:
```javascript
return items.map(item => {
  item.json.numericField = Number(item.json.stringField);
  return item;
});
```

3. **Validate Data Types**:
- Use IF node to check types before processing
- Add error handling for invalid types

**Best Practice**: Always validate and transform data types explicitly when passing data between nodes.

Fix data type conversion in 'Parse a posts box'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Expression Reference Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "MVPlLz3CiQok6rXy",
  "meta": {
    "instanceId": "workflow-fecedfa4",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.026648",
    "updatedAt": "2025-09-29T07:07:50.026670",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Merge PDFs",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "282b146b-ee58-4089-9ee6-94b153024bfa",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        740,
        -40
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "39a37abd-924f-474c-8dde-7536170797f2",
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        960,
        -140
      ],
      "parameters": {
        "url": "={{ $json.deeply.nested.undefined.path }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "b2359766-896f-4966-873e-b2dc0ee4f684",
      "name": "HTTP Request2",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        960,
        60
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "7f70b25c-a171-4a7c-8067-141ce3275226",
      "name": "Merge",
      "type": "n8n-nodes-base.merge",
      "position": [
        1180,
        -40
      ],
      "parameters": {},
      "typeVersion": 3.1,
      "notes": "This merge node performs automated tasks as part of the workflow."
    },
 ...

Output:
In node 'HTTP Request', the parameter 'url' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json.deeply.nested.undefined.path }}`
**Original Value**: `{{ $env.BASE_URL }}`

**Root Cause**: The expression references a field, node, or variable that doesn't exist in the data flow.

**Debugging Steps**:
1. Check the output of previous nodes to verify available fields
2. Use the Expression Editor to test expressions interactively
3. Add a Set node before this one to inspect available data
4. Use optional chaining for potentially undefined fields: `$json.field?.subfield`

**Best Practice**: Always validate data availability before using expressions.

Fix the expression in 'HTTP Request' parameter 'url'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Syntax Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "MkZ77sIELEO2kQx1"
  "meta": {
    "instanceId": "workflow-47ac9f44",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.057659",
    "updatedAt": "2025-09-29T07:07:50.057669",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "SearchApi Youtube Video Summary",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "2b0a439f-4b6e-4473-a6d5-9b0ec8db676b",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        20,
        280
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "662f79e0-d450-4d9e-a537-0e8f1a0870b6",
      "name": "Summarization Chain",
      "type": "n8n-nodes-base.noOp",
      "position": [
        900,
        280
      ],
      "parameters": {
        "options": {},
        "chunkingMode": "advanced"
      },
      "typeVersion": 2,
      "notes": "This chainSummarization node performs automated tasks as part of the workflow."
    },
    {
      "id": "fe17b482-8031-4d46-829b-59fe69dc8786",
      "name": "Recursive Character Text Splitter",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1080,
        500
      ],
      "parameters": {
        "options": {},
        "chunkSize": 6000
      },
      "typeVersion": 1,
      "notes": "This textSplitterRecursiveCharacterTextSplitter node performs automated tasks as part of the workflow."
    },
    {
      "id": "4829c2e9-c23a-452a-b409-7efc2e1e135d",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        460,
        280
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "transcripts"
      },
      "t...

Output: The JSON is invalid because a comma is missing between properties. JSON requires commas to separate object properties and array elements.

Add the missing comma between object properties.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Timeout Configuration

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "node-4cef8661"
    },
    {
      "name": "FunctionItem",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        450,
        300
      ],
      "parameters": {
        "functionCode": "// hashtag list\nconst Hashtags = [\n \"#techtwitter\",\n \"#n8n\"\n];\n\n// random output function\nconst randomHashtag = Hashtags[Math.floor(Math.random() * Hashtags.length)];\nitem.hashtag = randomHashtag;\nreturn item;"
      },
      "typeVersion": 1,
      "id": "node-5fc4c585"
    },
    {
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        650,
        300
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "requestMethod": "POST",
        "authentication": "{{ $credentials.headerAuth }}",
        "jsonParameters": true,
        "bodyParametersJson": "={\n \"prompt\": \"Generate a tweet, with under 100 characters, about and including the hashtag {{$node[\"FunctionItem\"].json[\"hashtag\"]}}:\",\n \"temperature\": 0.7,\n \"max_tokens\": 64,\n \"top_p\": 1,\n \"frequency_penalty\": 0,\n \"presence_penalty\": 0\n}"
      },
      "credentials": {
        "httpHeaderAuth": ""
      },
      "typeVersion": 1,
      "id": "node-e836482c"
    },
    {
      "name": "Airtable",
      "type": "n8n-nodes-base.airtable",
      "position": [
        1050,
        300
      ],
      "parameters": {
        "table": "main",
        "options": {},
        "operation": "append",
        "application": "appOaG8kEA8FAABOr"
      },
      "credentials": {
        "airtableApi": ""
      },
      "typeVersion": 1,
      "id": "node-ff099406"
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        850,
        300
      ],
 ...

Output:
This workflow may experience timeout issues with long-running API requests.

**Symptoms**:
- Execution hangs indefinitely
- Connection timeout errors
- ETIMEDOUT or ESOCKETTIMEDOUT errors

**Root Cause**: No timeout configured for HTTP requests, or external services are slow.

**Solutions**:

1. **Set Appropriate Timeouts**:
```json
"options": {
  "timeout": 30000  // 30 seconds
}
```

2. **Add Error Handling**:
- Use Error Trigger node to catch timeout errors
- Implement fallback logic for failed requests

3. **Use Async Patterns**:
- For long operations, use webhook callbacks
- Implement polling patterns instead of waiting

4. **Configure Node Settings**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 2000,
"continueOnFail": true
```

**Best Practice**: Set reasonable timeouts (10-30 seconds) and always have error handling for external API calls.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Rate Limiting Risk

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "Qpxx8UnnACBONNJu",
  "meta": {
    "instanceId": "workflow-bacac23f",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.060738",
    "updatedAt": "2025-09-29T07:07:50.060748",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "The Easiest Way to Send SMS Worldwide",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "807bfde2-a20e-41ad-87c5-70bcd31e3dcc",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -300,
        -100
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "369069a8-0b79-4e5a-9a89-4bccafdea247",
      "name": "Send SMS",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        140,
        -100
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n    \"messages\": [\n        {\n            \"source\": \"php\",\n            \"body\": \"{{ $json.sms }}\",\n            \"to\": \"{{ $json.to }}\"\n        }\n    ]\n}\n",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "authentication": "{{ $credentials.genericCredentialType }}",
        "genericAuthType": "httpBasicAuth",
        "headerParameters": {
          "parameters": [
            {
              "name": "Content-Type",
              "value": " application/json"
            }
          ]
        }
      },
      "credentials": {
        "httpBasicAuth": {
          "id": "UwsDe2JxT39eWIvY",
          "name": "ClickSend API"
        },
        "httpHeaderAuth": {
          "id": "M8w41EP0NFUSBShY",
          "name": "Cli...

Output:
This workflow may encounter rate limiting issues when processing large batches of data.

**Common Rate Limit Errors**:
- HTTP 429 Too Many Requests
- HTTP 503 Service Unavailable
- API-specific rate limit messages

**Root Cause**: The workflow makes too many API requests in a short time period without delays.

**Solutions**:

1. **Add Wait Nodes**: Insert a Wait node between API calls
```json
{
  "parameters": {"amount": 1, "unit": "seconds"},
  "name": "Rate Limit Delay",
  "type": "n8n-nodes-base.wait"
}
```

2. **Enable Retry on Fail**:
```json
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 5000
```

3. **Use Batch Processing**: Split items into smaller batches with delays

4. **Implement Exponential Backoff**: Increase wait times with each retry

**Best Practice**: Always check API documentation for rate limits and implement appropriate throttling.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Empty Input Handling

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "nodes": [
    {
      "id": "293b70f0-06e8-4db5-befd-bfaed1f3575a",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -460,
        80
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "1c473546-6280-412d-9f8e-b43962365d78",
      "name": "Set Params",
      "type": "n8n-nodes-base.set",
      "position": [
        -160,
        -60
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "8b5c6ca0-5ca8-4f67-abc1-44341cf419bc",
              "name": "system_prompt",
              "type": "string",
              "value": "You are an n8n fanboy."
            },
            {
              "id": "7c36c362-6269-4564-b6fe-f82126bc8f5e",
              "name": "user_prompt",
              "type": "string",
              "value": "What are the differences between n8n and Make?"
            },
            {
              "id": "4366d2b5-ad22-445a-8589-fddab1caa1ab",
              "name": "domains",
              "type": "string",
              "value": "n8n.io, make.com"
            }
          ]
        }
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "894bd6a4-5db7-45fb-a8e0-1a81af068bbf",
      "name": "Clean Output",
      "type": "n8n-nodes-base.set",
      "position": [
        580,
        -100
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "5859093c-6b22-41db-ac6c-9a9f6f18b7e3",
              "name": "output",
              "type": "string",
              "value": "={{ $json.choices[0].message.content }}"
            },
            {
              "id": "13208fff-5153-45a7-a1cb-fe49e32d9a03",
    ...

Output:
This workflow may fail when receiving empty or null input data.

**Common Error Messages**:
- "Cannot read property 'x' of undefined"
- "No items to process"
- "Input data is empty"

**Root Cause**: The workflow doesn't handle cases where:
- Trigger receives no data
- Previous node returns empty array
- API returns null or empty response

**Solutions**:

1. **Add IF Node for Empty Check**:
```json
{
  "parameters": {
    "conditions": {
      "number": [{
        "value1": "={{ $json.length }}",
        "operation": "larger",
        "value2": 0
      }]
    }
  },
  "name": "Check Not Empty",
  "type": "n8n-nodes-base.if"
}
```

2. **Use Default Values**:
```javascript
{{ $json.field ?? "default_value" }}
{{ $json.items || [] }}
```

3. **Add Set Node with Defaults**:
- Create a Set node that provides default values
- Place it early in the workflow

4. **Implement No Match Output**:
- Many nodes have "No Match" outputs
- Use these to handle empty cases gracefully

**Best Practice**: Always validate input data and provide sensible defaults for optional fields.

Add validation for empty or null input data.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Missing Credentials

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-241efbd8",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.059963",
    "updatedAt": "2025-09-29T07:07:50.059976",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "382dddd4-da50-49fa-90a2-f7d6d160afdf",
      "name": "When clicking \"Test workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        920,
        280
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "efa8f415-62f7-43b3-a76a-a2eabf779cb8",
      "name": "Map Workflows & Credentials",
      "type": "n8n-nodes-base.set",
      "position": [
        1360,
        280
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "0fd19a68-c561-4cc2-94d6-39848977e6d2",
              "name": "workflow_id",
              "type": "string",
              "value": "={{ $json.id }}"
            },
            {
              "id": "a81f9e6f-9c78-4c3d-9b79-e820f8c5ba29",
              "name": "workflow_name",
              "type": "string",
              "value": "={{ $json.name }}"
            },
            {
              "id": "58ab0f2f-7598-48de-bea1-f3373c5731fe",
              "name": "credentials",
              "type": "array",
              "value": "={{ $json.nodes.map(node => node.credentials).compact().reduce((acc,cred) => { const keys = Object.keys(cred); const items = keys.map(key => ({ type: key, ...cred[key] })); acc.push(...items); return acc; }, []) }}"
            }
          ]
        }
      },
      "typeVersion": 3.3,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "9e9b4f9c-12b7-47ba-8cf4-a9818902a538",
      "...

Output:
The node 'OpenAI Chat Model' (type: n8n-nodes-base.noOp) requires credentials but the 'credentials' configuration is missing.

**Root Cause**: The credentials object was not defined for this node.

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "openAiApi": {
    "id": "8gccIjcuf3gvaoEr",
    "name": "OpenAi account"
  }
}
```

**Best Practice**: Always verify credentials are properly configured before deploying workflows. Use n8n's credential management system to store sensitive data securely.

Add credentials configuration to the 'OpenAI Chat Model' node.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Syntax Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "ReXF4z8ZKcEd6Kea",
  "meta": {
    "instanceId": "workflow-63ed8b14",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.076384",
    "updatedAt": "2025-09-29T07:07:50.076403",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "dub.co URL Shortener",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "63170148-b769-43b6-9a7a-02baa9f76b02",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1480,
        1100
      ],
      "parameters": {
        "color": 4,
        "width": 346.4519761795601,
        "height": 227.3959699655325,
        "content": "## Dub.co API Limits:\nDub\u2019s API is capped at 10 requests per second per user."
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "defd82ef-25a0-4aa4-8681-d352e5fe8275",
      "name": "When clicking \"Test Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        1231,
        560
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "fec7fb8a-3f88-4de9-8392-5c7929a712e7",
      "name": "Sticky Note4",
      "type": "n8n-nodes-base.stickyNote",
      "disabled": true,
      "position": [
        1480,
        460
      ],
      "parameters": {
        "color": 4,
        "width": 826.4578951225271,
        "height": 605.7992490141105,
        "content": "## Dub.co API\n**Create** Link. [Based on their API docs]({{ $env.API_BASE_URL }}"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "8c87aad8-519c-491b-b272...

Output: The JSON is invalid because there is a trailing comma before a closing brace. Remove the extra comma.

Remove the trailing comma before the closing brace.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Expression Reference Error

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-41ed8075",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.051812",
    "updatedAt": "2025-09-29T07:07:50.051821",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "d9bae984-2ce7-4f6b-ab53-527ac9dfea3d",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        680,
        320
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "32ecf73c-b6e9-4bd6-9ecc-d82c4c50d7b5",
      "name": "Reddit",
      "type": "n8n-nodes-base.reddit",
      "position": [
        880,
        320
      ],
      "parameters": {
        "keyword": "YOUR_CREDENTIAL_HERE",
        "location": "allReddit",
        "operation": "search",
        "additionalFields": {
          "sort": "new"
        }
      },
      "credentials": {},
      "typeVersion": 1,
      "notes": "This reddit node performs automated tasks as part of the workflow."
    },
    {
      "id": "4b560620-a101-4566-b066-4ce3f44d8b0c",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        120,
        180
      ],
      "parameters": {
        "width": 507.1052631578949,
        "height": 210.99380804953552,
        "content": "## What this workflow does\n\u2714\ufe0e 1) Get posts from reddit that might be about n8n\n - Filter for the most relevant posts (posted in last 7 days and more than 5 upvotes and is original content)\n\n\u2714\ufe0e 2) Check if the post is actually about n8n\n\n\u2714\ufe0e 3) if it is, categorise with OpenAi.\n"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "f3be9af5-b4ff-4...

Output:
In node 'Error Handler', the parameter 'message' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json.deeply.nested.undefined.path }}`
**Original Value**: `Workflow execution error`

**Root Cause**: The expression references a field, node, or variable that doesn't exist in the data flow.

**Debugging Steps**:
1. Check the output of previous nodes to verify available fields
2. Use the Expression Editor to test expressions interactively
3. Add a Set node before this one to inspect available data
4. Use optional chaining for potentially undefined fields: `$json.field?.subfield`

**Best Practice**: Always validate data availability before using expressions.

Fix the expression in 'Error Handler' parameter 'message'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: Data Type Mismatch

Please analyze the workflow JSON and explain:
1. What is wrong
2. Why it's causing problems
3. How to fix it

Workflow JSON:
{
  "id": "ZCAkUSpaxzoRPbse",
  "meta": {
    "instanceId": "workflow-9db9a768",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:50.056978",
    "updatedAt": "2025-09-29T07:07:50.056999",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Search & Summarize Web Data with Perplexity, Gemini AI & Bright Data to Webhooks",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "674c6b61-76fa-4ac0-ab32-3f48ed5cba39",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -1140,
        400
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "f6066e4c-4f6f-48fd-b19f-2c25fdc5b8b2",
      "name": "Google Gemini Chat Model",
      "type": "n8n-nodes-base.noOp",
      "notes": "Gemini Experimental Model",
      "position": [
        760,
        580
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-2.0-flash-thinking-exp-01-21"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "YeO7dHZnuGBVQKVZ",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "notesInFlow": true,
      "typeVersion": 1
    },
    {
      "id": "e16a1442-924a-4558-90cb-1c9ddc606532",
      "name": "Default Data Loader",
      "type": "n8n-nodes-base.noOp",
      "position": [
        940,
        580
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This documentDefaultDataLoader node performs automated tasks as part of the workflow."
    },
    {
      "id": "a8d9bc8e-c5f6-4d66-af60-9eecb9f6569c",
      "name": "Recursive Character Text Splitter",
      "type":...

Output:
The node 'Sticky Note' has a data type mismatch in its parameters.

**Issue**: A field expected a number but received a string value.

**Common Causes**:
1. Expression returns string instead of number
2. JSON parsing preserves string types for numeric values
3. Upstream node outputs different data types than expected

**Solutions**:

1. **Type Conversion in Expression**:
```javascript
// Convert string to number
{ parseInt($json.stringValue) }
{ parseFloat($json.decimalString) }
{ Number($json.value) }
```

2. **Use Code Node for Transformation**:
```javascript
return items.map(item => {
  item.json.numericField = Number(item.json.stringField);
  return item;
});
```

3. **Validate Data Types**:
- Use IF node to check types before processing
- Add error handling for invalid types

**Best Practice**: Always validate and transform data types explicitly when passing data between nodes.