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-aab16153",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.226964",
    "updatedAt": "2025-09-29T07:07:53.227058",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "bc49829b-45f2-4910-9c37-907271982f14",
      "name": "Sticky Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -4200,
        -560
      ],
      "parameters": {
        "width": 780,
        "height": 540,
        "content": "### 5. Do you need more details?\nFind a step-by-step guide in this tutorial\n![Guide]({{ $env.WEBHOOK_URL }}\n[\ud83c\udfa5 Watch My Tutorial]({{ $env.WEBHOOK_URL }}"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "fca5a1f8-874b-4b25-92af-066e7ca03f67",
      "name": "Order Information",
      "type": "n8n-nodes-base.set",
      "position": [
        -4360,
        -1000
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "a55ebbb4-3eba-4584-8894-9e8d623d498f",
              "name": "documentType",
              "type": "string",
              "value": "={{ $json.summary.documentType }}"
            },
            {
              "id": "cbbff4da-4679-4258-bc3c-848075c5f1df",
              "name": "documentNumber",
              "type": "string",
              "value": "={{ $json.summary.documentNumber }}"
            },
            {
              "id": "a2eb5f07-8d1b-4c3a-b08b-a785045aeb34",
              "name": "orderDate",
              "type": "string",
              "value": "={{ $json.summary.orderDate }}"
            },
            {
              "id": "7e319d29-463b-4875-b556-684cb0c06c59",
              "name": "lineItemCount",
              "type": "string",
...

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:
{
  "meta": {
    "instanceId": "workflow-a8bb2959",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.207784",
    "updatedAt": "2025-09-29T07:07:53.207797",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "ff5634c3-349b-4181-a03a-97b310e5232b",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        120,
        60
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "66e204fb-3e00-45e0-b1b2-341836476b95",
      "name": "Extract page_info ",
      "type": "n8n-nodes-base.code",
      "position": [
        900,
        120
      ],
      "parameters": {
        "jsCode": "function parseNextParams(headerValue) {\n    // Match the URL inside <>\n    const urlMatch = headerValue.match(/<([^>]+)>;\\s*rel=\"next\"/);\n    if (!urlMatch) return null;\n\n    const url = urlMatch[1]; // Extracted URL\n    const paramsString = url.split(\"?\")[1]; // Get query string\n\n    if (!paramsString) return {}; // No params found\n\n    // Convert query string to object\n    return paramsString.split(\"&\").reduce((acc, param) => {\n        const [key, value] = param.split(\"=\");\n        acc[decodeURIComponent(key)] = decodeURIComponent(value);\n        return acc;\n    }, {});\n}\n\n/* Example usage\n`<{{ $env.API_BASE_URL }}>; rel=\"next\"`\n*/\nconst headerValue = $input.first().json.headers.link;\nconst params = parseNextParams(headerValue);\nreturn params;"
      },
      "typeVersion": 2,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "5b0086ce-f09b-4d55-86b6-9a14574506ab",
      "name": "Merge Loop items",
      "type": "n8n-nodes-base.code",
      "position": [
    ...

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: 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-5983227f",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.228699",
    "updatedAt": "2025-09-29T07:07:53.228710",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "19f32c25-df26-426d-8e28-f1d29c8571b1",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        -200,
        -240
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "data"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "7360c3f9-2e11-4839-b105-ecab66a39af2",
      "name": "HTTP Request1",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        20,
        -240
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "49cb0c7b-c9d8-4bf1-afa5-5afab9e7967e",
      "name": "Read/Write Files from Disk2",
      "type": "n8n-nodes-base.readWriteFile",
      "position": [
        460,
        -240
      ],
      "parameters": {
        "options": {},
        "fileName": "test.pdf",
        "operation": "write"
      },
      "typeVersion": 1,
      "notes": "This readWriteFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "05ef1b18-481d-40f8-a6b3-712bb9ba2b6f",
      "name": "Read/Write Files from Disk3",
      "type": "n8n-nodes-base.readWriteFile",
      "position": [
        680,
        -240
      ],
      "parameters": {
        "options": {},
        "fileSelector": "test.pdf"
      },
      "typeVersion": 1,
      "notes": "This readWriteFile node performs automated tasks as part of the workflow."
    },
    {
   ...

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: 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-ea194c33",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.330121",
    "updatedAt": "2025-09-29T07:07:53.330132",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "754006f5-1a7e-4e29-9850-e38b1d0c0d09",
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        360,
        80
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "6b7b0d05-38cc-4c2d-8a71-874ff5ad29d9",
      "name": "Split Out Order ",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        1080,
        200
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "result"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "1494f1ff-f377-4d56-8da7-274f0c182588",
      "name": "Globals",
      "type": "n8n-nodes-base.set",
      "position": [
        600,
        200
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "7411b768-9861-414c-aeaa-2743b3d61a3b",
              "name": "api-version",
              "type": "string",
              "value": "1.0"
            },
            {
              "id": "6cf546c5-5737-4dbd-851b-17d68e0a3780",
              "name": "modifiedAfter",
              "type": "string",
              "value": ""
            },
            {
              "id": "452efa28-2dc6-4ea3-a7a2-c35d100d0382",
              "name": "modifiedBefore",
              "type": "string",
              "value": ""
            },
            {
              "id": "81c4dc54-86bf-4432-a23f-22c7ea831e74",
           ...

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: 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-1cf57416",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.343047",
    "updatedAt": "2025-09-29T07:07:53.343059",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "59b7eed3-8622-4722-b93f-f225cc0aa4e0",
      "name": "Spam Detection",
      "type": "n8n-nodes-base.noOp",
      "position": [
        260,
        100
      ],
      "parameters": {
        "options": {},
        "inputText": "={{ $json.content }}",
        "categories": {
          "categories": [
            {
              "category": "is_spam",
              "description": "This text is a promotion, sales pitch or likely spam message to get members to visit another site."
            },
            {
              "category": "is_not_spam",
              "description": "This text is not spam."
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This textClassifier node performs automated tasks as part of the workflow."
    },
    {
      "id": "74420874-d831-4ff0-a8f4-e7c3b6551c57",
      "name": "Get Recent Messages",
      "type": "n8n-nodes-base.discord",
      "position": [
        -1020,
        40
      ],
      "webhookId": "7aa72e1f-06f4-4fe8-82ec-ad0e87a5b6b9",
      "parameters": {
        "guildId": {
          "__rl": true,
          "mode": "id",
          "value": "123456789"
        },
        "options": {
          "simplify": true
        },
        "resource": "message",
        "channelId": {
          "__rl": true,
          "mode": "list",
          "value": "1248678443432808512",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "general"
        },
        "operation": "getAll"
      },
      "credentials": {
        "discordBotApi": {
          "id": "YUwD52E3oHsSUWdW",
          "name": "Discord Bot account"
...

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: 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:
{
  "meta": {
    "instanceId": "workflow-6d30d92e:
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.325481",
    "updatedAt": "2025-09-29T07:07:53.325496",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "cce90ce3-5661-4c8b-9752-71bc0e643f01",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        -1880,
        -180
      ],
      "parameters": {
        "rule": {
          "interval": [
            {}
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "9f39b744-e3d5-4cb8-9631-d41ccb311e57",
      "name": "Embeddings OpenAI",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -840,
        -260
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.2,
      "notes": "This embeddingsOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "fd6f3243-3c94-4208-b200-511eef53f2f7",
      "name": "Default Data Loader",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -700,
        -260
      ],
      "parameters": {
        "options": {
          "metadata": {
            "metadataValues": [
              {
                "name": "project_key",
                "value": "={{ $json.project_key }}"
              },
              {
                "name": "issue_key",
                "value": "={{ $json.issue_key }}"
              },
              {
                "name": "issue_type",
                "value": "={{ $json.issue_type }}"
              },
              {
                "name": "created_at",
           ...

Output: The JSON contains an unclosed string. All string values must be enclosed in double quotes.

Add the missing closing quote to complete the string.


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-68f93a00",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.311441",
    "updatedAt": "2025-09-29T07:07:53.311456",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "fd4629a6-f7c3-4927-a3da-767d8206b486",
      "name": "set credentials",
      "type": "n8n-nodes-base.set",
      "position": [
        0,
        300
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "bfb7f25d-f992-4395-9fbe-939a57fc2a3c",
              "name": "n8n",
              "type": "string",
              "value": "=[your n8n instance without a trailling /]"
            },
            {
              "id": "538e0608-fd19-46ed-ba2c-c1efe03eaf9b",
              "name": "username",
              "type": "string",
              "value": "=your n8n username"
            },
            {
              "id": "ad1c4785-70d0-40d7-a61c-e97c3e8702e7",
              "name": "password",
              "type": "string",
              "value": "=your n8n password"
            }
          ]
        }
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "877bbd5c-fb57-4fa4-9d0a-113270113f31",
      "name": "login n8n",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        180,
        300
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "method": "POST",
        "options": {
          "response": {
            "response": {
              "fullResponse": true
            }
          }
        },
        "sendBody": true,
        "sendHeaders": true,
        "bodyParameters": {
          "parameters": [
            {
              "name": "emailOrLdapLoginId",
              "value": "={{ $json.use...

Output:
The node 'my-projects' 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 'my-projects'.


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-dfaf8431",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.326769",
    "updatedAt": "2025-09-29T07:07:53.326780",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "c3a9ba81-3a7e-4afe-be8b-cf482cbb88c2",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        -1040,
        -540
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "triggerAtHour": 6
            }
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "f63d035c-5a7b-4cf4-8730-5fa7dff6f94b",
      "name": "Get Subscribers",
      "type": "n8n-nodes-base.microsoftExcel",
      "position": [
        -860,
        -540
      ],
      "parameters": {
        "options": {},
        "resource": "worksheet",
        "workbook": {
          "__rl": true,
          "mode": "id",
          "value": "="
        },
        "operation": "readRows",
        "worksheet": {
          "__rl": true,
          "mode": "id",
          "value": "="
        }
      },
      "credentials": {
        "microsoftExcelOAuth2Api": {
          "id": "56tIUYYVARBe9gfX",
          "name": "Microsoft Excel account"
        }
      },
      "typeVersion": 2.1,
      "notes": "This microsoftExcel node performs automated tasks as part of the workflow."
    },
    {
      "id": "e93aa8de-5c68-4a01-ae60-beb141e0a430",
      "name": "Get Unique Categories",
      "type": "n8n-nodes-base.set",
      "position": [
        -400,
        -160
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "fe138128-50d5-469f-8c0b-0af8c873f198",
       ...

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: 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-4b98f7d0",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.346394",
    "updatedAt": "2025-09-29T07:07:53.346413",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "8f203423-b063-4918-a6ec-dad3ac7d1a20",
      "name": "When chat message received",
      "type": "n8n-nodes-base.noOp",
      "position": [
        860,
        -100
      ],
      "webhookId": "c82193c7-163c-4556-942f-81c80037e0ea",
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.1,
      "notes": "This chatTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "d9f2e90f-128b-458b-b3cf-79db2ec08633",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1000,
        100
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o-mini"
        },
        "options": {},
        "_injected_number_field": "not_a_number"
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.2,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "4f752502-8589-4e31-bbe1-4b8395e7325a",
      "name": "Simple Memory",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1160,
        100
      ],
      "parameters": {},
      "typeVersion": 1.3,
      "notes": "This memoryBufferWindow node performs automated tasks as part of the workflow."
    },
    {
      "id": "61ca5a4b-3661-4330-ac4c-e09e75dd764c",
      "name": "Acuity Support Search API",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1840,
        80
      ],
      "parameters": {
        "...

Output:
The node 'OpenAI Chat Model' 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 'OpenAI Chat Model'.


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-a0996b58",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.360361",
    "updatedAt": "2025-09-29T07:07:53.360375",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "f8f5a571-c4de-469e-a182-faa60060d06b",
      "name": "Has Shared with External Users",
      "type": "n8n-nodes-base.filter",
      "position": [
        40,
        -220
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "or",
          "conditions": [
            {
              "id": "c72e9718-b50a-4c5f-8a26-7b3fda89e202",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $json.shared && $json.permissions.some(item => item.emailAddress ? !item.emailAddress.endsWith('example.com') : false)  }}",
              "rightValue": ""
            },
            {
              "id": "0479b4ae-fc0c-49c4-8813-6978ea55265a",
              "operator": {
                "type": "object",
                "operation": "exists",
                "singleValue": true
              },
              "leftValue": "={{ $json.permissions.find(item => item.type === 'anyone') }}",
              "rightValue": ""
            }
          ]
        }
      },
      "typeVersion": 2.2,
      "notes": "This filter node performs automated tasks as part of the workflow."
    },
    {
      "id": "14b6d453-0403-476a-8537-cdeeace70115",
      "name": "Create New Sheet",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        -620,
        -220
      ],
      "parameters": {
     ...

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: 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-ba4f121e",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.427853",
    "updatedAt": "2025-09-29T07:07:53.427872",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "6d0b95c8-db4f-4bc1-b51b-87da0b1cbca9",
      "name": "Data Collection",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        820,
        3860
      ],
      "parameters": {
        "width": 380,
        "height": 620,
        "content": "# Data Collection\nFetches latest news articles from two RSS sources: Calcalist and Mako"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "62a73f4d-229f-44fa-891d-c36dc50bad99",
      "name": "Data Processing",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1260,
        3860
      ],
      "parameters": {
        "width": 740,
        "height": 360,
        "content": "# Data Processing\nFilters, sorts and prepares news articles for AI selection"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "13092778-b6a3-4436-b69d-f67245999ffe",
      "name": "AI Selection",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        2020,
        3860
      ],
      "parameters": {
        "width": 400,
        "height": 360,
        "content": "# AI Selection\nUses GPT-4o to select the top 5 most relevant articles for a senior executive"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "b1b25c3b-976e-41eb-a82d-e0571ba9b2f2",
      "name": "Email Generation",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1260,
        ...

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: 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-59ccd2d1",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.397814",
    "updatedAt": "2025-09-29T07:07:53.397865",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "33e94ee1-4244-4075-bb4b-93a99a2cacd9",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        20,
        560
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o-mini"
        },
        "options": {}
      },
      "typeVersion": 1.2,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "dd97266d-a039-4d8f-bc7d-fb439ad5a6d7",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -180,
        0
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "c4d4a979-3182-46c9-b145-fa4e6ba57011",
      "name": "Fetch Essay List",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        80,
        0
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "2e2913f9-d01a-41e8-b1b8-9a981910db7b",
      "name": "Extract essay names",
      "type": "n8n-nodes-base.html",
      "position": [
        280,
        0
      ],
      "parameters": {
        "options": {},
        "operation": "extractHtmlContent",
        "extractionValues": {
          "values": [
            {
              "key": "YOUR_CREDENTIAL_HERE",
              "attribute": "href",
    ...

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:
{
  "meta": {
    "instanceId": "workflow-4241edd3",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.410785",
    "updatedAt": "2025-09-29T07:07:53.410800",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "49620d3a-d4ec-4017-ade1-ff2ef5473c11",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -220,
        -80
      ],
      "parameters": {
        "color": 7,
        "width": 680,
        "height": 660,
        "content": "## 1. Set up an MCP Server Trigger\n[Read more about the MCP Server Trigger]({{ $env.WEBHOOK_URL }}"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "f0646a81-d328-4f07-a744-60f576b5a51e",
      "name": "Insert",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -40,
        380
      ],
      "parameters": {
        "name": "insert_review",
        "workflowId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $workflow.id }}"
        },
        "description": "=Call this tool to insert a customer's review into our review database.",
        "workflowInputs": {
          "value": {
            "text": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('text', `The contents of the review`, 'string') }}",
            "text2": "null",
            "operation": "insert",
            "companyIds": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('companyIds', `The company ID is their url address.`, 'string') }}"
          },
          "schema": [
            {
              "id": "operation",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "operation",
              "defaultMatch": false,
        ...

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:
{
  "meta": {
    "instanceId": "workflow-2a1259e7",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.428302",
    "updatedAt": "2025-09-29T07:07:53.428313",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "e3ed1048-bad0-4e91-bfb5-aef3e1883de4",
      "name": "Simplify Workflows",
      "type": "n8n-nodes-base.set",
      "position": [
        -1740,
        0
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "821226b0-12ad-4d1d-81c3-dfa3c286cce4",
              "name": "id",
              "type": "string",
              "value": "={{ $json.id }}"
            },
            {
              "id": "629d95d6-2501-4ad4-a5ed-e557237e1cc2",
              "name": "name",
              "type": "string",
              "value": "={{ $json.name }}"
            },
            {
              "id": "30699f7c-98d3-44ee-9749-c5528579f7e6",
              "name": "description",
              "type": "string",
              "value": "={{\n$json.nodes\n  .filter(node => node.type === 'n8n-nodes-base.stickyNote')\n  .filter(node => node.parameters.content.toLowerCase().includes('try it out'))\n  .map(node => node.parameters.content.substr(0,255) + '...')\n  .join('\\n')\n}}"
            },
            {
              "id": "6199c275-1ced-4f72-ba59-cb068db54c1b",
              "name": "parameters",
              "type": "string",
              "value": "={{\n(function(node) {\n  if (!node) return {};\n  const inputs = node.parameters.workflowInputs.values;\n  return {\n    \"type\": \"object\",\n    \"required\": inputs.map(input => input.name),\n    \"properties\": inputs.reduce((acc, input) => ({\n      ...acc,\n      [input.name]: { type: input.type ?? 'string' }\n    }), {})\n  }\n})(\n$json.nodes\n  .filter(node => node.type === 'n8n-no...

Output:
The workflow has a broken data flow. The node '194fbcbc-a7bb-41c8-9289-a214b1415386' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for '194fbcbc-a7bb-41c8-9289-a214b1415386'.

**Impact**: Data from '194fbcbc-a7bb-41c8-9289-a214b1415386' 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 '194fbcbc-a7bb-41c8-9289-a214b1415386' 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": {
  "194fbcbc-a7bb-41c8-9289-a214b1415386": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect '194fbcbc-a7bb-41c8-9289-a214b1415386' to the workflow.


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:
{
  "nodes": [
    {
      "id": "18813eed-27a8-4338-8e71-abb270d43082",
      "name": "Split by object",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        -260,
        540
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "object"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "ee610ddd-5bd7-4d97-82a9-b688c71616d8",
      "name": "Fetch properties from Hubspot",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -40,
        540
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "authentication": "{{ $credentials.predefinedCredentialType }}",
        "nodeCredentialType": "YOUR_CREDENTIAL_HERE"
      },
      "credentials": {
        "hubspotOAuth2Api": {
          "id": "JxzF93M0SJ00jDD9",
          "name": "HubSpot account"
        },
        "hubspotDeveloperApi": {
          "id": "EN6KsMdrxSVNfhyz",
          "name": "HubSpot Developer account"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "22662720-97ae-4e59-a70e-3b858e8e632d",
      "name": "Define crm_type",
      "type": "n8n-nodes-base.code",
      "position": [
        180,
        540
      ],
      "parameters": {
        "mode": "runOnceForEachItem",
        "jsCode": "// Loop over input items and add a new field called 'myNewField' to the JSON of each one\n\nfor (let result of $json.results) {\n  result.crm_type = $('Split by object').item.json.object;\n  delete result.options\n}\nreturn {results: $json.results};\n\n"
      },
      "typeVersion": 2,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "abfdd971-1112-4dd4-9513-13f12f3e92f2",
      "name": "Split results",
      "type": "n8n-nodes-base.splitOut",
      "pos...

Output:
The node 'Uploads to Hubspot' (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": {
  "hubspotOAuth2Api": {
    "id": "JxzF93M0SJ00jDD9",
    "name": "HubSpot account"
  },
  "hubspotDeveloperApi": {
    "id": "EN6KsMdrxSVNfhyz",
    "name": "HubSpot Developer 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 'Uploads to Hubspot' 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:
{
  "meta": {
    "instanceId": "workflow-bca002cf",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.461022",
    "updatedAt": "2025-09-29T07:07:53.461040",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "7976731d-692d-45f8-b986-3f82d998dfa0",
      "name": "Research Company",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        600,
        780
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "options": {},
        "requestMethod": "POST",
        "authentication": "{{ $credentials.headerAuth }}",
        "jsonParameters": true,
        "bodyParametersJson": "={{\n  JSON.stringify({\n    model: \"gpt-4o\",\n    tools: [{ type: \"web_search_preview\" }],\n    input: $json.prompt\n  })\n}}",
        "queryParametersJson": "{}",
        "headerParametersJson": "{}"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "rhDo5pdVQQsBgcVZ",
          "name": "Header Auth account 2"
        }
      },
      "typeVersion": 1,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "2f123bde-a5a0-4828-81e8-b875ac27d081",
      "name": "Research Person",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        940,
        960
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "options": {},
        "requestMethod": "POST",
        "authentication": "{{ $credentials.headerAuth }}",
        "jsonParameters": true,
        "bodyParametersJson": "={{\n  JSON.stringify({\n    model: \"gpt-4o\",\n    tools: [{ type: \"web_search_preview\" }],\n    input: $json.prompt\n  })\n}}",
        "queryParametersJson": "{}",
        "headerParametersJson": "{}"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "rhDo5pdVQQsBgcVZ",
  ...

Output:
In node 'Sticky Note', the parameter 'content' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json["non_existent_field"] }}`
**Original Value**: `## 2. Research Attendee + Company

API calls are made to the OpenAI Responses API using the new web search preview endpoint. This allows us to search the web for any mentions of each attendee. If the email address is a company email, we also make a search request to find out about the company. We use some context about ourself (in the "Set Context" node) so that the LLM can make an educated guess if there are many people with the same name.`

**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 'Sticky Note' parameter 'content'.


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:
{
  "meta": {
    "instanceId": "workflow-7f582033",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.446352",
    "updatedAt": "2025-09-29T07:07:53.446364",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "ea812abb-5f9c-45d9-9cca-c82cd100fa94",
      "name": "Google Sheets Trigger",
      "type": "n8n-nodes-base.googleSheetsTrigger",
      "position": [
        -2000,
        800
      ],
      "parameters": {
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyX",
              "unit": "minutes"
            }
          ]
        },
        "sheetName": {
          "__rl": true,
          "mode": "list",
          "value": "gid=0",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "Companies"
        },
        "documentId": {
          "__rl": true,
          "mode": "list",
          "value": "1KqKFZ7Uxrt1MivBjLklGdPRMgNBhEc0slpthoSjt2wI",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "Copy of Company Decision Maker Discovery"
        }
      },
      "typeVersion": 1,
      "notes": "This googleSheetsTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "8ac2066b-c84f-4556-a700-d95f015e6869",
      "name": "Apollo Organization Enrichment",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -460,
        800
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "options": {},
        "sendQuery": true,
        "jsonHeaders": "{\n    \"accept\": \"application/json\",\n    \"Cache-Control\": \"no-cache\",\n    \"Content-Type\": \"application/json\",\n    \"x-api-key\": \"your-api-key\"\n}",
        "sendHeaders": true,
        "specifyHeaders": "json",
        "queryParameters": {
          "paramet...

Output:
The workflow has a broken data flow. The node 'a9ff1d43-7eb8-4bad-87b5-bff8d1e7df99' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'a9ff1d43-7eb8-4bad-87b5-bff8d1e7df99'.

**Impact**: Data from 'a9ff1d43-7eb8-4bad-87b5-bff8d1e7df99' 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 'a9ff1d43-7eb8-4bad-87b5-bff8d1e7df99' 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": {
  "a9ff1d43-7eb8-4bad-87b5-bff8d1e7df99": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'a9ff1d43-7eb8-4bad-87b5-bff8d1e7df99' 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-6f07f167",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.507137",
    "updatedAt": "2025-09-29T07:07:53.507160",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "f1b36f4b-6558-4e83-a999-e6f2d24e196c",
      "name": "OpenRouter Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        620,
        240
      ],
      "parameters": {
        "model": "openai/gpt-4.1",
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenRouter node performs automated tasks as part of the workflow."
    },
    {
      "id": "89ca0a07-286f-4e68-9e85-0327a4859cc0",
      "name": "Structured Output Parser",
      "type": "n8n-nodes-base.noOp",
      "position": [
        900,
        240
      ],
      "parameters": {
        "schemaType": "manual",
        "inputSchema": "{\n  \"type\": \"array\",\n  \"items\": {\n    \"type\": \"object\",\n    \"properties\": {\n      \"name\": { \"type\": \"string\" },\n      \"description\": { \"type\": \"string\" },\n      \"rating\": { \"type\": \"number\" },\n      \"reviews\": { \"type\": \"integer\" },\n      \"price\": { \"type\": \"string\" }\n    },\n    \"required\": [\"name\", \"description\", \"rating\", \"reviews\", \"price\"]\n  }\n}"
      },
      "typeVersion": 1.2,
      "notes": "This outputParserStructured node performs automated tasks as part of the workflow."
    },
    {
      "id": "e4800c1d-c0d8-4093-81ec-fc19ad0034cd",
      "name": "scrap url",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        240,
        60
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "method": "POST",
        "options": {},
        "sendBody": true,
        "sendHeaders": true,
        "bodyParameters": {
          "parameters": [
            {
  ...

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: 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": [
    {
      "id": "2804a082-c17b-482f-828d-901dab7e7a11",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -160,
        40
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "58d51340-5246-4089-ae63-f16ff4be184e",
      "name": "Get list of owners",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        280,
        40
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "options": {},
        "authentication": "{{ $credentials.predefinedCredentialType }}",
        "nodeCredentialType": "YOUR_CREDENTIAL_HERE"
      },
      "credentials": {
        "hubspotOAuth2Api": {
          "id": "qubiIFrowxvUdpu6",
          "name": "HubSpot account for node"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "335ffd8c-68fa-4d55-85e9-462963a8a291",
      "name": "Get list of clients for owner",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        280,
        575
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n  \"filterGroups\": [\n    {\n      \"filters\": [\n        {\n          \"propertyName\": \"hubspot_owner_id\",\n          \"operator\": \"EQ\",\n          \"value\": \"{{ $('When Executed by Another Workflow').item.json.ownerId }}\"\n        }\n      ]\n    }\n  ],\n  \"properties\": [\"firstname\", \"lastname\", \"email\", \"linkedinURL\", \"company\"],\n\"limit\": 200,\n\"after\": {{ $node['Edit'].json[\"sofar\"] }}\n} ",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "{{ $credentials.predefinedCredentialType }}",
        "nodeCredentialType": "YOUR...

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: 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-7c50a561",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.508319",
    "updatedAt": "2025-09-29T07:07:53.508329",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "ed993205-977a-43cd-8d0b-4faef216d766",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        360,
        -120
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "predictions"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "67f2bb16-ee38-4bc8-9cc7-50a44614cc3b",
      "name": "Imagen 3.0",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        140,
        -120
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "method": "POST",
        "options": {},
        "jsonBody": "={{\n{\n  \"instances\": [\n    {\n      \"prompt\": [\n        $json.candidates[0].content.parts[0].text,\n       `Generate the following image: ${$('Variables').first().json.targetPrompt}`\n      ].join(' ')\n    }\n  ],\n  \"parameters\": {\n    \"sampleCount\": $('Variables').first().json.numberSamples.toNumber()\n  }\n}\n}}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "{{ $credentials.predefinedCredentialType }}",
        "nodeCredentialType": "YOUR_CREDENTIAL_HERE"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "dSxo6ns5wn658r8N",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "b1730c97-8c5c-48a5-90cf-7940f6c9e2d0",
      "name": "Variables",
      "type": "n8n-nodes-base.set",
      "position...

Output:
The node 'Upload to Cloudinary' 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 'Upload to Cloudinary'.


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-b790b0bf",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.529229",
    "updatedAt": "2025-09-29T07:07:53.529240",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "f4322829-1799-4954-a75a-b40e95f41c10",
      "name": "Get Last Week's Messages",
      "type": "n8n-nodes-base.slack",
      "position": [
        -2200,
        -160
      ],
      "webhookId": "8078218a-7edc-4e0b-9b4d-9860bd309877",
      "parameters": {
        "filters": {
          "oldest": "={{ $now.minus('1', 'week') }}",
          "inclusive": false
        },
        "resource": "channel",
        "channelId": {
          "__rl": true,
          "mode": "list",
          "value": "C06RS1WPUQ6",
          "cachedResultName": "general"
        },
        "operation": "history",
        "returnAll": true
      },
      "credentials": {
        "slackApi": {
          "id": "VfK3js0YdqBdQLGP",
          "name": "Slack account"
        }
      },
      "typeVersion": 2.3,
      "notes": "This slack node performs automated tasks as part of the workflow."
    },
    {
      "id": "f0e89c19-ee1f-4a4d-8176-c222c18e0514",
      "name": "Simplify Message",
      "type": "n8n-nodes-base.set",
      "position": [
        -1320,
        380
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "547e8934-e6f2-47f0-b8a0-c60bd9d8a0c3",
              "name": "ts",
              "type": "string",
              "value": "={{ $json.ts }}"
            },
            {
              "id": "22473b44-b1d9-4b85-b0d9-1a54c5511ff4",
              "name": "userId",
              "type": "string",
              "value": "={{ $('Get User').first().json.id }}"
            },
            {
              "id": "2059b147-8b12-42c9-bee8-488dc11a0b...

Output:
The node 'Sticky Note2' 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 Note2'.


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:
{
  "meta": {
    "instanceId": "workflow-2c05ba79",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.512135",
    "updatedAt": "2025-09-29T07:07:53.512148",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "ee39f797-6f6f-4a62-9cf1-0c95b47baf23",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        -160,
        0
      ],
      "parameters": {
        "rule": {
          "interval": [
            {}
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "c1b9fadc-586b-4edf-a19a-6995479d4de5",
      "name": "Fetch Latest Channel Messages",
      "type": "n8n-nodes-base.microsoftTeams",
      "position": [
        60,
        0
      ],
      "webhookId": "b36a534a-1bca-4c3d-ab25-777ca98fba1a",
      "parameters": {
        "teamId": {
          "__rl": true,
          "mode": "id",
          "value": "=fc62d6a3-eaba-430f-b451-3c3107751ba0"
        },
        "resource": "channelMessage",
        "channelId": {
          "__rl": true,
          "mode": "id",
          "value": "=19:NQuQMYvvtC9DcTEQs1Vul1Nm1xIXnRmznAwov7MuNZ81@thread.tacv2"
        },
        "operation": "getAll"
      },
      "credentials": {
        "microsoftTeamsOAuth2Api": {
          "id": "AUH9lDgO5KTl2J6q",
          "name": "Microsoft Teams account"
        }
      },
      "typeVersion": 2,
      "notes": "This microsoftTeams node performs automated tasks as part of the workflow."
    },
    {
      "id": "1be03962-5028-47a8-8deb-3c59c121df01",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        920,
        140
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
  ...

Output:
The workflow has a broken data flow. The node '1be03962-5028-47a8-8deb-3c59c121df01' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for '1be03962-5028-47a8-8deb-3c59c121df01'.

**Impact**: Data from '1be03962-5028-47a8-8deb-3c59c121df01' 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 '1be03962-5028-47a8-8deb-3c59c121df01' 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": {
  "1be03962-5028-47a8-8deb-3c59c121df01": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect '1be03962-5028-47a8-8deb-3c59c121df01' to the workflow.


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": "43gMd18arOcxqDcC",
  "meta": {
    "instanceId": "workflow-a5b12c83",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.545241",
    "updatedAt": "2025-09-29T07:07:53.545252",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "LLM Chaining examples",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "35e53ce7-06b4-47ca-b7f3-b147bd059fcf",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        200,
        520
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "aeef734e-1c3b-4a91-93ae-2ae9c50951b8",
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        400,
        520
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "7f6b95eb-df8c-4f0f-ba69-6b298d624ccd",
      "name": "Markdown",
      "type": "n8n-nodes-base.markdown",
      "position": [
        600,
        520
      ],
      "parameters": {
        "html": "={{ $json.data }}",
        "options": {},
        "destinationKey": "YOUR_CREDENTIAL_HERE"
      },
      "typeVersion": 1,
      "notes": "This markdown node performs automated tasks as part of the workflow."
    },
    {
      "id": "994dbe06-4c25-4fb3-a8f3-566eb5b66c6d",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        160,
        340
      ],
      "parameters": {
        "color": 4,
        "width": 700,
        "height": 360,
        "content...

Output: The JSON is invalid because it is missing a closing brace '}' at the end of the file. Add the missing '}' to close the workflow object.

Add a closing brace '}' at the end of the JSON.


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": "5DiXT9FykJvuElc1",
  "meta": {
    "instanceId": "workflow-fc5ff82b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.557093",
    "updatedAt": "2025-09-29T07:07:53.557120",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Get Comments from Facebook Page",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "a9c1f0fb-396e-4c36-92d4-ec3eeb36c644",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        600,
        240
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "9031abae-aaa0-4602-8fb1-29e89c73f3e8",
      "name": "Split Out Comments",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        2400,
        240
      ],
      "parameters": {
        "include": "allOtherFields",
        "options": {},
        "fieldToSplitOut": "data"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "c8216862-1d39-47e6-b59e-cf1fb17f7226",
      "name": "Filter Out Null Comments",
      "type": "n8n-nodes-base.filter",
      "position": [
        2180,
        240
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "4d8bd55c-35d0-40db-98ac-a954b0a99710",
              "operator": {
                "type": "array",
                "operation": "notEmpty",
                "singl...

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:
{
  "id": "7fdJOvYNILCr24fH",
  "meta": {
    "instanceId": "workflow-90f384ee",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.544247",
    "updatedAt": "2025-09-29T07:07:53.544259",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Read sitemap and filter URLs",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "38910330-5286-4f3f-b62e-9216acccd503",
      "name": "\u2018Test workflow\u2019 trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -460,
        -60
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "d4e5991b-62d9-45ca-962f-c1077f3bce19",
      "name": "Set sitemap URL",
      "type": "n8n-nodes-base.set",
      "position": [
        -280,
        -60
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "d6c5ac86-6d67-42fb-96ec-9826caf452e2",
              "name": "sitemapUrl",
              "type": "string",
              "value": "{{ $env.WEBHOOK_URL }}"
            }
          ]
        }
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "0d957deb-5830-4077-97e4-437dc7c0e527",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        260,
        -60
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "urlset.url"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "7021088c-dfa1-4aae-b2e7-15b0ca10a750",
      "name": "Get Sitemap",
      "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:
{
  "id": "7wwY8wfZdNpL83QQ",
  "meta": {
    "instanceId": "workflow-45ec8d29",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.608258",
    "updatedAt": "2025-09-29T07:07:53.608279",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "LinkedIn Leads Scraping & Enrichment (Main)",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "5d07dfa4-6e6a-41a6-a2ea-8a8787331735",
      "name": "On form submission",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        -80,
        -80
      ],
      "webhookId": "28ff6927-5d05-4182-910b-be2381e3b2c4",
      "parameters": {
        "options": {},
        "formTitle": "Leads Search",
        "formFields": {
          "values": [
            {
              "fieldLabel": "Job Title",
              "requiredField": true
            },
            {
              "fieldLabel": "Location",
              "requiredField": true
            },
            {
              "fieldType": "number",
              "fieldLabel": "Number of Leads",
              "requiredField": true
            }
          ]
        }
      },
      "typeVersion": 2.2,
      "notes": "This formTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "76ade63a-7b44-4fd1-85d8-6dbacd83aca7",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        360,
        -80
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "people"
      },
      "typeVersion": 1,
      "alwaysOutputData": false,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "3c7b7179-a8b9-41d6-9617-8eb7af38f571",
      "name": "Google Sheets Trigger",
      "type": "n8n-nodes-base.googleSheetsTrigger",
    ...

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:
{
  "id": "7zRCNv7B5WFRg7ux",
  "meta": {
    "instanceId": "workflow-0263394e",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.578857",
    "updatedAt": "2025-09-29T07:07:53.578884",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Restore your credentials from GitHub",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "f8aff38c-3e40-4820-b8f5-50e3e1f878c8",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -640,
        -120
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "f838e0c6-36aa-4c0b-bdd2-ef096ffd3d1d",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1020,
        -140
      ],
      "parameters": {
        "width": 320,
        "height": 420,
        "content": "## Restore from GitHub \nThis workflow will restore all instance credentials from GitHub backups.\n\n\n### Setup\nOpen `Globals` node and update the values below \ud83d\udc47\n\n- **repo.owner:** your Github username\n- **repo.name:** the name of your repository\n- **repo.path:** the folder to use within the repository.\n\n\nIf your username was `john-doe` and your repository was called `n8n-backups` and you wanted the credentials to go into a `credentials` folder you would set:\n\n- repo.owner - john-doe\n- repo.name - n8n-backups\n- repo.path - credentials/\n"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "8f59b7b0-ea9d-4209-8c6b-d48fe9d8cf7b",
      "name": "Globals",
      "type": "n8n-nodes-base.set",
      "position":...

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: 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": "87FUCRVFV07sNlbM",
  "meta": {
    "instanceId": "workflow-e501632e",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.633524",
    "updatedAt": "2025-09-29T07:07:53.633542",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Workflow Importer",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "eb3d4912-09c3-4c17-8e2b-94dd15e145f4",
      "name": "Extract from File",
      "type": "n8n-nodes-base.extractFromFile",
      "position": [
        2960,
        440
      ],
      "parameters": {
        "options": {},
        "operation": "fromJson",
        "destinationKey": "YOUR_CREDENTIAL_HERE",
        "binaryPropertyName": "Workflow_File"
      },
      "typeVersion": 1,
      "notes": "This extractFromFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "56b7a01f-47a0-4884-9200-5f5f695ab355",
      "name": "Export Credentials",
      "type": "n8n-nodes-base.executeCommand",
      "position": [
        3180,
        620
      ],
      "parameters": {
        "command": "n8n export:credentials --all --pretty --decrypted --output=/tmp/cred"
      },
      "typeVersion": 1,
      "notes": "This executeCommand node performs automated tasks as part of the workflow."
    },
    {
      "id": "85de1146-4d61-45bf-b225-956d3d16e84b",
      "name": "Get Credentials Data",
      "type": "n8n-nodes-base.readWriteFile",
      "position": [
        3400,
        620
      ],
      "parameters": {
        "options": {},
        "fileSelector": "/tmp/cred"
      },
      "typeVersion": 1,
      "notes": "This readWriteFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "187f1f50-472f-41ac-96e8-9c2f17fa3c00",
      "name": "Binary to JSON",
      "type": "n8n-nodes-base.extractFromFile",
...

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: 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:
{
  "nodes": [
    {
      "id": "065d7ec9-edc5-46f6-b8ac-d62ed0e5c8e3",
      "name": "Baserow Event",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -1180,
        -140
      ],
      "webhookId": "267ea500-e2cd-4604-a31f-f0773f27317c",
      "parameters": {
        "path": "267ea500-e2cd-4604-a31f-f0773f27317c",
        "options": {},
        "httpMethod": "POST"
      },
      "typeVersion": 2,
      "notes": "This webhook node performs automated tasks as part of the workflow."
    },
    {
      "id": "ac1403b4-9d45-404d-9892-0bed39b9ec82",
      "name": "Event Type",
      "type": "n8n-nodes-base.switch",
      "position": [
        -220,
        -140
      ],
      "parameters": {
        "rules": {
          "values": [
            {
              "outputKey": "YOUR_CREDENTIAL_HERE",
              "conditions": {
                "options": {
                  "version": 2,
                  "leftValue": "",
                  "caseSensitive": true,
                  "typeValidation": "strict"
                },
                "combinator": "and",
                "conditions": [
                  {
                    "id": "2162daf8-d23d-4b8f-8257-bdfc5400a3a8",
                    "operator": {
                      "name": "filter.operator.equals",
                      "type": "string",
                      "operation": "equals"
                    },
                    "leftValue": "={{ $json.event_type }}",
                    "rightValue": "rows.updated"
                  }
                ]
              },
              "renameOutput": true
            },
            {
              "outputKey": "YOUR_CREDENTIAL_HERE",
              "conditions": {
                "options": {
                  "version": 2,
                  "leftValue": "",
                  "caseSensitive": true,
                  "typeValidation": "strict"
                },
                "combinator": "and",
                "conditions": [
              ...

Output:
The node 'Update Row' (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": "F28aPWK5NooSHAg0",
    "name": "Baserow (n8n-local)"
  }
}
```

**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 'Update Row' 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:
{
  "nodes": [
    {
      "id": "c3ef40df-084e-435c-9a11-3aa0a2f94f36",
      "name": "When clicking \"Test workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        740,
        520
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "e0583472-a450-4582-83bc-84a014bea543",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        1640,
        520
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "output.results"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "b8aa573d-5b63-4669-900f-bcc915b6ad41",
      "name": "Save to Google Sheets",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1900,
        520
      ],
      "parameters": {
        "columns": {
          "value": {},
          "schema": [
            {
              "id": "name",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "name",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "price",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "price",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "availability",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "availability",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "imag...

Output:
In node 'Information Extractor', the parameter 'inputSchema' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json["non_existent_field"] }}`
**Original Value**: `{
 "results": {
 "type": "array",
 "items": {
 "type": "object",
 "properties": {
 "price": {
 "type": "string"
 },
 "title": {
 "type": "string"
 },
 "image_url": {
 "type": "string"
 },
 "product_url": {
 "type": "string"
 },
 "availability": {
 "type": "string"
 }
 }
 }
 }
}`

**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 'Information Extractor' parameter 'inputSchema'.


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:
{
  "meta": {
    "instanceId": "workflow-20412d49"
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.674629",
    "updatedAt": "2025-09-29T07:07:53.674640",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "be49d136-6392-481d-8544-d4f4d4fd0357",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        90,
        260
      ],
      "parameters": {
        "color": 7,
        "width": 1000.427054367056,
        "height": 572.2734520891689,
        "content": "## Find WooCommerce User-ID\nUser-ID is required to query past orders"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "5932f77b-63e2-4991-aa16-2b8587b2b560",
      "name": "No email provided",
      "type": "n8n-nodes-base.set",
      "position": [
        400,
        640
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "9a06428b-4115-4eee-97f4-8e828c5a7e5a",
              "name": "response",
              "type": "string",
              "value": "No email address got provided."
            }
          ]
        }
      },
      "typeVersion": 3.3,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "909a9a47-8683-4a1f-a359-8f6a878f8cd7",
      "name": "If email provided",
      "type": "n8n-nodes-base.if",
      "position": [
        140,
        460
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "13f7bd32-5760-4ac3-...

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: 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-3b93ab48",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.674131",
    "updatedAt": "2025-09-29T07:07:53.674151",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "bec5c6c1-52d4-4665-b814-56a6bb82ea6b",
      "name": "OpenAI Chat Model1",
      "type": "n8n-nodes-base.noOp",
      "position": [
        800,
        660
      ],
      "parameters": {
        "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": "d3e057d1-df44-4ac3-ac46-fc2b04e3de78",
      "name": "Get Meeting ConferenceRecords",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        20,
        580
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "options": {},
        "sendQuery": true,
        "authentication": "{{ $credentials.predefinedCredentialType }}",
        "queryParameters": {
          "parameters": [
            {
              "name": "filter",
              "value": "=space.meeting_code={{ $json.conferenceData.conferenceId }}"
            }
          ]
        },
        "nodeCredentialType": "YOUR_CREDENTIAL_HERE"
      },
      "credentials": {
        "googleOAuth2Api": {
          "id": "kgVOfvlBIWTWXthG",
          "name": "Google Meets Oauth2 API"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "831668fd-04ab-4144-bec0-c733902f2a13",
      "name": "Get Meeting Transcript Location",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
   ...

Output:
The node 'Get Transcript File' 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 'Get Transcript File'.