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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9"
  },
  "nodes": [
    {
      "id": "67850bd7-f9f4-4d5b-8c9e-bd1451247ba6",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -740,
        1000
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "0d9133f9-b6d3-4101-95c6-3cd24cdb70c3",
      "name": "Fetch essay list",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -520,
        1000
      ],
      "parameters": {
        "url": "http://www.paulgraham.com/articles.html",
        "options": {}
      },
      "typeVersion": 4.1
    },
    {
      "id": "ee634297-a456-4f70-a995-55b02950571e",
      "name": "Extract essay names",
      "type": "n8n-nodes-base.html",
      "position": [
        -300,
        1000
      ],
      "parameters": {
        "options": {},
        "operation": "extractHtmlContent",
        "dataPropertyName": "=data",
        "extractionValues": {
          "values": [
            {
              "key": "essay",
              "attribute": "href",
              "cssSelector": "table table a",
              "returnArray": true,
              "returnValue": "attribute"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "id": "83d75693-dbb8-44c4-8533-da06f611c59c",
      "name": "Fetch essay texts",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        360,
        1000
      ],
      "parameters": {
        "url": "=http://www.paulgraham.com/{{ $json.essay }}",
        "options": {}
      },
      "typeVersion": 4.1
    },
    {
      "id": "151022b5-8570-4176-bf3f-137f27ac7036",
      "name": "Extract title",
      "type": "n8n-nodes-base.html",
      "position": [
        700,
        700
      ],
      "parameters": {
        "options": {},
        "operation": "extractHtmlContent",
        "extractionValues": {
   ...

Output:
The node 'OpenAI Chat Model1' (type: @n8n/n8n-nodes-langchain.lmChatOpenAi) requires credentials but the 'credentials' configuration is missing.

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

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

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

Add credentials configuration to the 'OpenAI Chat Model1' node.


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

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

Workflow JSON:
{
  "id": "w434EiZ2z7klQAyp",
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "Scrape Trustpilot Reviews with DeepSeek, Analyze Sentiment with OpenAI",
  "tags": [
    {
      "id": "2VG6RbmUdJ2VZbrj",
      "name": "Google Drive",
      "createdAt": "2024-12-04T16:50:56.177Z",
      "updatedAt": "2024-12-04T16:50:56.177Z"
    },
    {
      "id": "paTcf5QZDJsC2vKY",
      "name": "OpenAI",
      "createdAt": "2024-12-04T16:52:10.768Z",
      "updatedAt": "2024-12-04T16:52:10.768Z"
    }
  ],
  "nodes": [
    {
      "id": "095a8e10-1630-4a1a-b6c9-7950ae1ed803",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        320,
        -380
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "recensioni"
      },
      "typeVersion": 1
    },
    {
      "id": "6ff4dd9d-eedd-4d84-b13a-b3c0db717409",
      "name": "Information Extractor",
      "type": "@n8n/n8n-nodes-langchain.informationExtractor",
      "position": [
        -440,
        140
      ],
      "parameters": {
        "text": "=You need to extract the review from the following HTML: {{ $json.recensione }}",
        "options": {
          "systemPromptTemplate": "You are a review expert. You need to extract only the required information and report it without changing anything.\nAll the required information is in the text."
        },
        "attributes": {
          "attributes": [
            {
              "name": "autore",
              "required": true,
              "description": "Extract the name of the review author"
            },
            {
              "name": "valutazione",
              "type": "number",
              "required": true,
              "description": "Extract the rating given to the review (from 1 to 5)"
            },
            {
              "name": "data",
              "required": true,
           ...

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:
{
  "id": "K3uf8aY8wipScEay",
  "meta": {
    "instanceId": "558d88703fb65b2d0e44613bc35916258b0f0bf983c5d4730c00c424b77ca36a",
    "templateCredsSetupCompleted": true
  },
  "name": "Google analytics template",
  "tags": [],
  "nodes": [
    {
      "id": "6a9fc442-d0a3-48be-8dff-94f8d9cd5cf1",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        460,
        460
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "weeks"
            }
          ]
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "484cbc41-f57d-4c3d-a458-e439d480d290",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        460,
        640
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "b1b66e9b-5fea-407b-9c1e-39bd2a9d4a90",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        460,
        100
      ],
      "parameters": {
        "width": 714.172987012987,
        "content": "## Send Google analytics to A.I. and save results to baserow\n\nThis workflow will check for country views, page engagement and google search console results. It will take this week's data and compare it to last week's data.\n\n[You can read more about this workflow here](https://rumjahn.com/how-i-used-a-i-to-be-an-seo-expert-and-analyzed-my-google-analytics-data-in-n8n-and-make-com/)"
      },
      "typeVersion": 1
    },
    {
      "id": "adde29fc-ddb5-4b50-aa78-313ac9ede879",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        633.6540259740264,
        320
      ],
      "parameters": {
        "color": 4,
        "width": 2097.92831168831,
        "height": 342.6576623376624,
        "content": "## Property ID\n\n1. Create your [Google Analytics Credentials](https://docs.n8n.io/integr...

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: 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": "vzU9QRZsHcyRsord",
  "meta": {
    "instanceId": "a9f3b18652ddc96459b459de4fa8fa33252fb820a9e5a1593074f3580352864a",
    "templateCredsSetupCompleted": true
  },
  "name": "Spot Workplace Discrimination Patterns with AI",
  "tags": [
    {
      "id": "76EYz9X3GU4PtgSS",
      "name": "human_resources",
      "createdAt": "2025-01-30T18:52:17.614Z",
      "updatedAt": "2025-01-30T18:52:17.614Z"
    },
    {
      "id": "ey2Mx4vNaV8cKvao",
      "name": "openai",
      "createdAt": "2024-12-23T07:10:13.400Z",
      "updatedAt": "2024-12-23T07:10:13.400Z"
    }
  ],
  "nodes": [
    {
      "id": "b508ab50-158a-4cbf-a52e-f53e1804e770",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        280,
        380
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "11a1a2d5-a274-44f7-97ca-5666a59fcb31",
      "name": "OpenAI Chat Model1",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        2220,
        800
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "XXXXXX",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "395f7b67-c914-4aae-8727-0573fdbfc6ad",
      "name": "OpenAI Chat Model2",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        2220,
        380
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "XXXXXX",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "6ab194a9-b869-4296-aea9-19afcbffc0d7",
      "name": "Merge",
      "type": "n8n-nodes-base.merge",
      "position": [
        2940,
        600
      ],
      "parameters": {
        "mode": "combine",
        "options": {},
        "combineBy": "combineByPosition"
      },
      "typeVer...

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: Expression Reference Error

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

Workflow JSON:
{
  "id": "qmmXKcpJOCm9qaCk",
  "meta": {
    "instanceId": "558d88703fb65b2d0e44613bc35916258b0f0bf983c5d4730c00c424b77ca36a",
    "templateCredsSetupCompleted": true
  },
  "name": "SERPBear analytics template",
  "tags": [],
  "nodes": [
    {
      "id": "2ad0eb40-6628-4c6b-bc15-7081e7712f1a",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        260,
        380
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "5a3c9ad8-a562-4bb0-bb11-c325552d8101",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        260,
        160
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "weeks"
            }
          ]
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "bdfa7388-f9b3-4145-90de-2e58138e14bf",
      "name": "Get data from SerpBear",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        580,
        260
      ],
      "parameters": {
        "url": "https://myserpbearinstance.com/api/keyword?id=22",
        "options": {},
        "sendQuery": true,
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "queryParameters": {
          "parameters": [
            {
              "name": "domain",
              "value": "rumjahn.com"
            }
          ]
        }
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "3fshHb4fyI5XfLyq",
          "name": "Header Auth account 6"
        }
      },
      "executeOnce": false,
      "typeVersion": 4.2,
      "alwaysOutputData": false
    },
    {
      "id": "c169f4e3-ab60-4b46-9f49-cf27a13dd7c6",
      "name": "Parse data from SerpBear",
      "type": "n8n-nodes-base.code",
      "position": [
        820,
        260
      ],
      "parameters": {
        "jsCode": "const keywords = items[...

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

**Faulty Expression**: `={{ $node.NonExistentNode.json.data }}`
**Original Value**: `## Send Matomo analytics to A.I. and save results to baserow

This workflow will check the Google keywords for your site and it's rank.

[💡 You can read more about this workflow here](https://rumjahn.com/how-to-create-an-a-i-agent-to-analyze-serpbear-keyword-rankings-using-n8n-for-free-without-any-coding-skills-required/)`

**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: 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": "eZT6SZ4Kvmq5TzyQ",
  "meta": {
    "instanceId": "558d88703fb65b2d0e44613bc35916258b0f0bf983c5d4730c00c424b77ca36a",
    "templateCredsSetupCompleted": true
  },
  "name": "Umami analytics template",
  "tags": [],
  "nodes": [
    {
      "id": "8a54ac1c-a072-42e6-a3ba-8cde33475eb5",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        460,
        220
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "e81c9be0-f59d-467e-9bda-eeb2d66ed31e",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        460,
        380
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "weeks",
              "triggerAtDay": [
                4
              ]
            }
          ]
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "01b04872-9aea-4834-8df5-f6c91914133d",
      "name": "Get view stats from Umami",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        760,
        260
      ],
      "parameters": {
        "url": "=https://umami.mydomain.com/api/websites/86d4095c-a2a8-4fc8-9521-103e858e2b41/event-data/stats?startAt={{ DateTime.now().minus({ days: 7 }).toMillis() }}&endAt={{ DateTime.now().toMillis() }}&unit=hour&timezone=Asia%2FHong_Kong",
        "options": {},
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "FKsKXvQUlaX5qt9n",
          "name": "Header Auth account 3"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "38d342e3-10ad-4260-8f44-5a3233ec3166",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        660,
        -260
      ],
      "parameters": {
        "width": 504.88636363636317,
        "content": "## Send ...

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: 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": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9"
  },
  "nodes": [
    {
      "id": "0404384b-10b6-4666-84a4-8870db30c607",
      "name": "Embeddings OpenAI",
      "type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
      "position": [
        1220,
        280
      ],
      "parameters": {
        "model": "text-embedding-3-small",
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "a6741f04-5a5b-47a9-ac08-eb562f9f6052",
      "name": "Default Data Loader",
      "type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
      "position": [
        1340,
        280
      ],
      "parameters": {
        "options": {
          "metadata": {
            "metadataValues": [
              {
                "name": "question",
                "value": "={{ $json.question }}"
              },
              {
                "name": "participant",
                "value": "={{ $json.participant }}"
              },
              {
                "name": "survey",
                "value": "={{ $('Get Survey Results').params.documentId.cachedResultName }}"
              }
            ]
          }
        },
        "jsonData": "={{ $json.answer }}",
        "jsonMode": "expressionData"
      },
      "typeVersion": 1
    },
    {
      "id": "7663c3dd-f713-4034-bef6-0c000285f54f",
      "name": "Convert to Question Answer Pairs",
      "type": "n8n-nodes-base.set",
      "position": [
        720,
        160
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "6b593ffb-ffbd-4cf5-a508-cd4f2a6d1004",
              "name": "data",
              "type": "array",
              "value": "={{\n Object.keys($json)\n .filter(key => !['row_number', 'Participant'].includes(key)...

Output:
In node 'Questions to List', the parameter 'fieldToSplitOut' contains an expression that references undefined data.

**Faulty Expression**: `={{ $items[999].json.value }}`
**Original Value**: `question`

**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 'Questions to List' parameter 'fieldToSplitOut'.


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

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

Workflow JSON:
{
  "id": "kZ3aL4r7xc96Q7lp",
  "meta": {
    "instanceId": "b8b2c0d20b02864cf66adc9cbefc86e9e56de0252b653d37ba6613341b5e0bef",
    "templateCredsSetupCompleted": true
  },
  "name": "Selenium Ultimate Scraper Workflow",
  "tags": [],
  "nodes": [
    {
      "id": "20d35d68-db49-4183-a913-85ad06c13912",
      "name": "Extract First Url Match",
      "type": "n8n-nodes-base.html",
      "position": [
        1820,
        540
      ],
      "parameters": {
        "options": {},
        "operation": "extractHtmlContent",
        "extractionValues": {
          "values": [
            {
              "key": "Url Find ",
              "attribute": "href",
              "cssSelector": "=a[href*=\"https://\"][href*=\"{{ $('Edit Fields (For testing prupose )').item.json['Website Domaine'] }}\"]\n",
              "returnArray": true,
              "returnValue": "attribute"
            }
          ]
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "9167ea20-fc9c-4d75-bf4d-bb2016079dd0",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        2060,
        700
      ],
      "parameters": {
        "model": "gpt-4o",
        "options": {}
      },
      "typeVersion": 1
    },
    {
      "id": "42a8646d-1b0b-4309-a87d-9c8aeb355a28",
      "name": "Clean Webdriver ",
      "type": "n8n-nodes-base.httpRequest",
      "notes": "Script to delete traces of selenium in the browser ",
      "position": [
        3120,
        560
      ],
      "parameters": {
        "url": "=http://selenium_chrome:4444/wd/hub/session/{{ $('Create Selenium Session').item.json.value.sessionId }}/execute/sync",
        "method": "POST",
        "options": {},
        "jsonBody": "{\n \"script\": \"Object.defineProperty(navigator, 'webdriver', { get: () => undefined }); window.navigator.chrome = { runtime: {} }; Object.defineProperty(navigator, 'languages', { get: () => ['en-US', 'en'] }); Object.defineProperty(navig...

Output:
The node 'OpenAI Chat Model' (type: @n8n/n8n-nodes-langchain.lmChatOpenAi) requires credentials but the 'credentials' configuration is missing.

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "openAiApi": {
    "id": "FmszNHDDVS32ud21",
    "name": "OpenAi account"
  }
}
```

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

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


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

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

Workflow JSON:
{
  "id": "pPtCy6qPfEv1qNRn",
  "meta": {
    "instanceId": "205b3bc06c96f2dc835b4f00e1cbf9a937a74eeb3b47c99d0c30b0586dbf85aa"
  },
  "name": "[1/3 - anomaly detection] [1/2 - KNN classification] Batch upload dataset to Qdrant (crops dataset)",
  "tags": [
    {
      "id": "n3zAUYFhdqtjhcLf",
      "name": "qdrant",
      "createdAt": "2024-12-10T11:56:59.987Z",
      "updatedAt": "2024-12-10T11:56:59.987Z"
    }
  ],
  "nodes": [
    {
      "id": "53831410-b4f3-4374-8bdd-c2a33cd873cb",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -640,
        0
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "e303ccea-c0e0-4fe5-bd31-48380a0e438f",
      "name": "Google Cloud Storage",
      "type": "n8n-nodes-base.googleCloudStorage",
      "position": [
        820,
        160
      ],
      "parameters": {
        "resource": "object",
        "returnAll": true,
        "bucketName": "n8n-qdrant-demo",
        "listFilters": {
          "prefix": "agricultural-crops"
        },
        "requestOptions": {}
      },
      "credentials": {
        "googleCloudStorageOAuth2Api": {
          "id": "fn0sr7grtfprVQvL",
          "name": "Google Cloud Storage account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "737bdb15-61cf-48eb-96af-569eb5986ee8",
      "name": "Get fields for Qdrant",
      "type": "n8n-nodes-base.set",
      "position": [
        1080,
        160
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "10d9147f-1c0c-4357-8413-3130829c2e24",
              "name": "=publicLink",
              "type": "string",
              "value": "=https://storage.googleapis.com/{{ $json.bucket }}/{{ $json.selfLink.split('/').splice(-1) }}"
            },
            {
              "id": "ff9e6a0b-e47a-4550-a13b-465507c75f8f",
              "name": "cro...

Output:
The node 'Batch Upload to Qdrant' (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": {
  "qdrantApi": {
    "id": "it3j3hP9FICqhgX6",
    "name": "QdrantApi 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 'Batch Upload to Qdrant' node.


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

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

Workflow JSON:
{
  "id": "m9aACcHqydEbH4nR",
  "meta": {
    "instanceId": "205b3bc06c96f2dc835b4f00e1cbf9a937a74eeb3b47c99d0c30b0586dbf85aa"
  },
  "name": "[2/3] Set up medoids (2 types) for anomaly detection (crops dataset)",
  "tags": [
    {
      "id": "spMntyrlE9ydvWFA",
      "name": "anomaly-detection",
      "createdAt": "2024-12-08T22:05:15.945Z",
      "updatedAt": "2024-12-09T12:50:19.287Z"
    }
  ],
  "nodes": [
    {
      "id": "edaa871e-2b79-400e-8328-333d250bfdd2",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -660,
        -220
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "ebd964de-faa4-4dc0-9245-cc9154b9ce02",
      "name": "Total Points in Collection",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        180,
        -220
      ],
      "parameters": {
        "url": "={{ $('Qdrant cluster variables').item.json.qdrantCloudURL }}/collections/{{ $('Qdrant cluster variables').item.json.collectionName }}/points/count",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n \"exact\": true\n}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "qdrantApi"
      },
      "credentials": {
        "qdrantApi": {
          "id": "it3j3hP9FICqhgX6",
          "name": "QdrantApi account"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "b51f6344-d090-4341-a908-581b78664b07",
      "name": "Cluster Distance Matrix",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1200,
        -360
      ],
      "parameters": {
        "url": "={{ $('Qdrant cluster variables').first().json.qdrantCloudURL }}/collections/{{ $('Qdrant cluster variables').first().json.collectionName }}/points/search/matrix/offsets",
        "method": "POST",
        "options": {},
        "jsonBody": "={{\n{\n \"sampl...

Output:
The workflow has a broken data flow. The node 'Medoids Variables' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'Medoids Variables'.

**Impact**: Data from 'Medoids Variables' 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 'Medoids Variables' 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": {
  "Medoids Variables": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'Medoids Variables' 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": "G8jRDBvwsMkkMiLN",
  "meta": {
    "instanceId": "205b3bc06c96f2dc835b4f00e1cbf9a937a74eeb3b47c99d0c30b0586dbf85aa"
  },
  "name": "[3/3] Anomaly detection tool (crops dataset)",
  "tags": [
    {
      "id": "spMntyrlE9ydvWFA",
      "name": "anomaly-detection",
      "createdAt": "2024-12-08T22:05:15.945Z",
      "updatedAt": "2024-12-09T12:50:19.287Z"
    }
  ],
  "nodes": [
    {
      "id": "e01bafec-eb24-44c7-b3c4-a60f91666350",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1200,
        180
      ],
      "parameters": {
        "color": 6,
        "width": 400,
        "height": 740,
        "content": "We are working here with crops dataset: \nExisting (so not anomalies) crops images in dataset are:\n- 'pearl_millet(bajra)',\n- 'tobacco-plant',\n- 'cherry',\n- 'cotton',\n- 'banana',\n- 'cucumber',\n- 'maize',\n- 'wheat',\n- 'clove',\n- 'jowar',\n- 'olive-tree',\n- 'soyabean',\n- 'coffee-plant',\n- 'rice',\n- 'lemon',\n- 'mustard-oil',\n- 'vigna-radiati(mung)',\n- 'coconut',\n- 'gram',\n- 'pineapple',\n- 'sugarcane',\n- 'sunflower',\n- 'chilli',\n- 'fox_nut(makhana)',\n- 'jute',\n- 'papaya',\n- 'tea',\n- 'cardamom',\n- 'almond'\n"
      },
      "typeVersion": 1
    },
    {
      "id": "b9943781-de1f-4129-9b81-ed836e9ebb11",
      "name": "Embed image",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        680,
        60
      ],
      "parameters": {
        "url": "https://api.voyageai.com/v1/multimodalembeddings",
        "method": "POST",
        "options": {},
        "jsonBody": "={{\n{\n \"inputs\": [\n {\n \"content\": [\n {\n \"type\": \"image_url\",\n \"image_url\": $('Image URL hardcode').first().json.imageURL\n }\n ]\n }\n ],\n \"model\": \"voyage-multimodal-3\",\n \"input_type\": \"document\"\n}\n}}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth"
      },
...

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: 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": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9"
  },
  "nodes": [
    {
      "id": "cb62c9a5-2f43-4328-af94-84c2cb731d9c",
      "name": "Base Image",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        260,
        660
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $json.base }}"
        },
        "options": {
          "binaryPropertyName": "data_1"
        },
        "operation": "download"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "yOwz41gMQclOadgu",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 3
    },
    {
      "id": "b1c304cc-9949-441a-ac2a-275c8d4c51fc",
      "name": "Google Gemini Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
      "position": [
        1120,
        900
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-1.5-pro-latest"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "dSxo6ns5wn658r8N",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "964d94bf-be2a-424e-ab0e-c1c1fe260ebd",
      "name": "Structured Output Parser",
      "type": "@n8n/n8n-nodes-langchain.outputParserStructured",
      "position": [
        1320,
        900
      ],
      "parameters": {
        "schemaType": "manual",
        "inputSchema": "{\n \"type\": \"array\",\n \"items\": {\n \"type\": \"object\",\n\t\"properties\": {\n\t\t\"type\": {\n \t\t\"type\": \"string\",\n \"description\": \"type of regression. One of text, number, image, color or position.\"\n \t\t},\n\t\t\"description\": { \"type\": \"string\" },\n \"previous_state\": { \"type\": \"string\" },\n \"current_state\": { \"type\": \"string\" }\n\t}\n }\n}"
      },
      "typeVersion": 1.2
    },
    {
      "id": "67195eb2-172...

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

Add the missing colon after the property name.


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

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

Workflow JSON:
{
  "id": "eOUewYsEzJmQixI6",
  "meta": {
    "instanceId": "77c4feba8f41570ef06dc76ece9a6ded0f0d44f7f1477a64c2d71a8508c11faa",
    "templateCredsSetupCompleted": true
  },
  "name": "Chat with Postgresql Database",
  "tags": [],
  "nodes": [
    {
      "id": "6501a54f-a68c-452d-b353-d7e871ca3780",
      "name": "When chat message received",
      "type": "@n8n/n8n-nodes-langchain.chatTrigger",
      "position": [
        -300,
        -80
      ],
      "webhookId": "cf1de04f-3e38-426c-89f0-3bdb110a5dcf",
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.1
    },
    {
      "id": "cd32221b-2a36-408d-b57e-8115fcd810c9",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        0,
        -80
      ],
      "parameters": {
        "agent": "openAiFunctionsAgent",
        "options": {
          "systemMessage": "You are DB assistant. You need to run queries in DB aligned with user requests.\n\nRun custom SQL query to aggregate data and response to user. Make sure every table has schema prefix to it in sql query which you can get from `Get DB Schema and Tables List` tool.\n\nFetch all data to analyse it for response if needed.\n\n## Tools\n\n- Execute SQL query - Executes any sql query generated by AI\n- Get DB Schema and Tables List - Lists all the tables in database with its schema name\n- Get Table Definition - Gets the table definition from db using table name and schema name"
        }
      },
      "typeVersion": 1.7
    },
    {
      "id": "8accbeeb-7eaf-4e9e-aabc-de8ab3a0459b",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        -60,
        160
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o-mini"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "48uG61Ilo8jndw3r",
          "name": "Your Op...

Output:
The node 'Get DB Schema and Tables List' 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 DB Schema and Tables List'.


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

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

Workflow JSON:
{
  "id": "P307QnrxpA1ddsM5",
  "meta": {
    "instanceId": "fb924c73af8f703905bc09c9ee8076f48c17b596ed05b18c0ff86915ef8a7c4a",
    "templateCredsSetupCompleted": true
  },
  "name": "Generate SQL queries from schema only - AI-powered",
  "tags": [],
  "nodes": [
    {
      "id": "b7c3ca47-11b3-4378-81fa-68b2f56b295e",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        1460,
        440
      ],
      "parameters": {
        "model": "gpt-4o",
        "options": {
          "temperature": 0.2
        }
      },
      "credentials": {
        "openAiApi": {
          "id": "rveqdSfp7pCRON1T",
          "name": "Ted's Tech Talks OpenAi"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "977c3a82-440b-4d44-9042-47a673bcb52c",
      "name": "Window Buffer Memory",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "position": [
        1640,
        440
      ],
      "parameters": {
        "contextWindowLength": 10
      },
      "typeVersion": 1.2
    },
    {
      "id": "c6e9c0e2-d238-4f0b-a4c8-2271f2c8b31b",
      "name": "No Operation, do nothing",
      "type": "n8n-nodes-base.noOp",
      "position": [
        2340,
        520
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "4c141ae8-d2d1-45c7-bb5d-f33841d3cee6",
      "name": "List all tables in a database",
      "type": "n8n-nodes-base.mySql",
      "position": [
        520,
        -35
      ],
      "parameters": {
        "query": "SHOW TABLES;",
        "options": {},
        "operation": "executeQuery"
      },
      "typeVersion": 2.4
    },
    {
      "id": "54fb3362-041b-4e4f-bfea-f0bc788d8dfd",
      "name": "Extract database schema",
      "type": "n8n-nodes-base.mySql",
      "position": [
        700,
        -35
      ],
      "parameters": {
        "query": "DESCRIBE {{ $json.Tables_in_tttytdb2023 }};",
        "options": {},
        "operation": "executeQuer...

Output:
The node 'List all tables in a database' (type: n8n-nodes-base.mySql) 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": {
  "mySql": {
    "id": "ICakJ1LRuVl4dRTs",
    "name": "db4free TTT 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 'List all tables in a database' node.


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": "1a23006df50de49624f69e85993be557d137b6efe723a867a7d68a84e0b32704"
  },
  "nodes": [
    {
      "id": "54065cc9-047c-4741-95f6-cec3e352abd7",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        2700,
        -1840
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "url",
          "value": "https://drive.google.com/file/d/xxxxxxxxxxxxxxx/view"
        },
        "options": {},
        "operation": "download"
      },
      "typeVersion": 3
    },
    {
      "id": "62af57f5-a001-4174-bece-260a1fc595e8",
      "name": "Default Data Loader",
      "type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
      "position": [
        3120,
        -1620
      ],
      "parameters": {
        "loader": "epubLoader",
        "options": {},
        "dataType": "binary"
      },
      "typeVersion": 1
    },
    {
      "id": "ce3d9c7c-6ce9-421a-b4d0-4235217cf8e6",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        2620,
        -2000
      ],
      "parameters": {
        "width": 749.1276349295781,
        "height": 820.5109034066329,
        "content": "# INSERTING\n\n- it's important to use the same embedding model when for any interaction with your vector database (inserting, upserting and retrieval)"
      },
      "typeVersion": 1
    },
    {
      "id": "81cb3d3e-70af-46c8-bc18-3d076a222d0b",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1720,
        -1160
      ],
      "parameters": {
        "color": 3,
        "width": 873.9739981925188,
        "height": 534.0012007720542,
        "content": "# UPSERTING\n"
      },
      "typeVersion": 1
    },
    {
      "id": "60ebdb71-c7e0-429b-9394-b680cc000951",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1720,
        -2000
      ],
...

Output:
The workflow has a broken data flow. The node 'When chat message received' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'When chat message received'.

**Impact**: Data from 'When chat message received' 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 'When chat message received' 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": {
  "When chat message received": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'When chat message received' 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" "AQJ6QnF2yVdCWMnx",
  "meta": {
    "instanceId": "fb924c73af8f703905bc09c9ee8076f48c17b596ed05b18c0ff86915ef8a7c4a",
    "templateCredsSetupCompleted": true
  },
  "name": "SQL agent with memory",
  "tags": [],
  "nodes": [
    {
      "id": "3544950e-4d8e-46ca-8f56-61c152a5cae3",
      "name": "Window Buffer Memory",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "position": [
        1220,
        500
      ],
      "parameters": {
        "contextWindowLength": 10
      },
      "typeVersion": 1.2
    },
    {
      "id": "743cc4e7-5f24-4adc-b872-7241ee775bd0",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        1000,
        500
      ],
      "parameters": {
        "model": "gpt-4-turbo",
        "options": {
          "temperature": 0.3
        }
      },
      "credentials": {
        "openAiApi": {
          "id": "rveqdSfp7pCRON1T",
          "name": "Ted's Tech Talks OpenAi"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "cc30066c-ad2c-4729-82c1-a6b0f4214dee",
      "name": "When clicking \"Test workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        500,
        -80
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "0deacd0d-45cb-4738-8da0-9d1251858867",
      "name": "Get chinook.zip example",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        700,
        -80
      ],
      "parameters": {
        "url": "https://www.sqlitetutorial.net/wp-content/uploads/2018/03/chinook.zip",
        "options": {}
      },
      "typeVersion": 4.2
    },
    {
      "id": "61f34708-f8ed-44a9-8522-6042d28511ae",
      "name": "Extract zip file",
      "type": "n8n-nodes-base.compression",
      "position": [
        900,
        -80
      ],
      "parameters": {},
      "typeVersion": 1.1
    },
    {
      "id": "6a12d9ac-f1b7-4267-8b34-58cdb9d347bb",
      "name": "Save c...

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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:
{
  "name": "Start/Stop a Docker service",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "docker/:action/:service",
        "authentication": "basicAuth",
        "responseMode": "responseNode",
        "options": {}
      },
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2.1,
      "position": [
        -1984,
        320
      ],
      "id": "e5953025-eff5-4aaa-9367-93314eee7c91",
      "name": "Webhook",
      "webhookId": "de42a9a3-38fe-40a9-a0ea-891a82c021e5",
      "alwaysOutputData": true,
      "executeOnce": true
    },
    {
      "parameters": {
        "command": "=cd {{ $json.params.service }} && docker compose up -d",
        "cwd": "/home/ferristhiel"
      },
      "type": "n8n-nodes-base.ssh",
      "typeVersion": 1,
      "position": [
        -1312,
        32
      ],
      "id": "87b48131-6631-4675-9f8f-fe98c290b80f",
      "name": "Start",
      "alwaysOutputData": true,
      "executeOnce": true,
      "credentials": {
        "sshPassword": {
          "id": "POdOIYhR5Qu9Uob8",
          "name": "My Server's SSH Password"
        }
      }
    },
    {
      "parameters": {
        "command": "=cd {{ $json.params.service }} && docker compose down",
        "cwd": "/home/ferristhiel"
      },
      "type": "n8n-nodes-base.ssh",
      "typeVersion": 1,
      "position": [
        -1312,
        416
      ],
      "id": "ff1915d8-8522-4074-987b-a2d9f237255c",
      "name": "Stop",
      "alwaysOutputData": true,
      "executeOnce": true,
      "credentials": {
        "sshPassword": {
          "id": "POdOIYhR5Qu9Uob8",
          "name": "My Server's SSH Password"
        }
      }
    },
    {
      "parameters": {
        "respondWith": "text",
        "responseBody": "=Docker Service \"{{ $('Webhook').item.json.params.service }}\" was found and successfully started!",
        "options": {}
      },
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.4,
      "position...

Output:
The node 'Webhook' (type: n8n-nodes-base.webhook) 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": {
  "httpBasicAuth": {
    "id": "SzVLzGYkPN0xTmdA",
    "name": "Ferris Thiel"
  }
}
```

**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 'Webhook' node.


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

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

Workflow JSON:
{
  "name": "Update Server",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "update",
        "authentication": "basicAuth",
        "responseMode": "responseNode",
        "options": {}
      },
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2.1,
      "position": [
        0,
        -16
      ],
      "id": "ab983738-8b2e-4388-b9e2-8849a307cd18",
      "name": "Webhook",
      "webhookId": "06dec1b4-a026-43f6-8af9-aa71edc18c9d"
    },
    {
      "parameters": {
        "command": "sudo apt update && sudo apt upgrade -y"
      },
      "type": "n8n-nodes-base.ssh",
      "typeVersion": 1,
      "position": [
        224,
        -16
      ],
      "id": "d75fdbb3-3768-463d-8c24-08e183962ef3",
      "name": "Execute a command",
      "alwaysOutputData": true,
      "executeOnce": false,
      "credentials": {
        "sshPassword": {
          "id": "POdOIYhR5Qu9Uob8",
          "name": "My Server's SSH Password"
        }
      }
    },
    {
      "parameters": {
        "respondWith": "text",
        "responseBody": "={{ $json.stdout }}",
        "options": {}
      },
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.4,
      "position": [
        448,
        -16
      ],
      "id": "b6b13f8b-28fe-487f-b65d-8351f1c91648",
      "name": "Respond to Webhook"
    },
    {
      "parameters": {
        "content": "## What it does:\nThis workflow is built for updating your linux system with a single API Request which can be automated in web interfaces or shortcut app...\n## Setup:\nAdd your credentials for basic auth and ssh\nCopy the custom webhook url and get started!\nExample:\n``` curl\ncurl -X POST -u \"username:password\" https://<your-domain>/update\n```\n## Info:\nThis workflow is built only for debian based systems but i think it is not too hard to change for your needs ;-)",
        "height": 352,
        "width": 672
      },
      "type": "n8n-nodes-base.stickyNote",
      "ty...

Output:
The node 'Webhook' (type: n8n-nodes-base.webhook) 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": {
  "httpBasicAuth": {
    "id": "SzVLzGYkPN0xTmdA",
    "name": "Ferris Thiel"
  }
}
```

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


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

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

Workflow JSON:
{
  "id": "180",
  "meta": {
    "instanceId": "fb924c73af8f703905bc09c9ee8076f48c17b596ed05b18c0ff86915ef8a7c4a"
  },
  "name": "Discord AI bot",
  "tags": [],
  "nodes": [
    {
      "id": "6f188270-2c08-491f-bf52-c4a152b33aa0",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        1220,
        780
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "e4839de2-fc04-40b0-b6bc-596455ad93fe",
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        1220,
        580
      ],
      "webhookId": "d0cdd428-be96-4821-85bc-65342cf928d0",
      "parameters": {
        "path": "d0cdd428-be96-4821-85bc-65342cf928d0",
        "options": {},
        "httpMethod": "POST"
      },
      "typeVersion": 1
    },
    {
      "id": "15dcafe1-6361-4775-ace0-e34fd2a143b4",
      "name": "No Operation, do nothing",
      "type": "n8n-nodes-base.noOp",
      "position": [
        2120,
        940
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "0d28fe8e-da80-458b-9a75-d316019cb3ae",
      "name": "Analyze user request",
      "type": "n8n-nodes-base.openAi",
      "position": [
        1420,
        680
      ],
      "parameters": {
        "model": "gpt-4",
        "prompt": {
          "messages": [
            {
              "role": "system",
              "content": "Act as a service desk agent and help to categorize user messages. Return back only JSON without quotations. Do not return anything else."
            },
            {
              "content": "=Here is a user feedback: \"{{ $json.body.feedback }}\". Please analyse it and put into one of the categories:\n1. \"success-story\" for user appraisal or success story. this will be processed by customer success department\n2. \"urgent-issue\" for extreme dissatisfaction or an urgent problem. this will be escalated to the IT team. Please assess if the request...

Output:
In node 'Select category', the parameter 'value1' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json.deeply.nested.undefined.path }}`
**Original Value**: `={{ $json.gpt_reply.category.toLowerCase() }}`

**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 'Select category' parameter 'value1'.


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

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

Workflow JSON:
{
  "id": "LF8gz3iz74u45a5i",
  "meta": {
    "instanceId": "889f0d7d968f3b02a88433e2529a399907d2ca89e329934b608193beaa2301f8"
  },
  "name": "YouTube Videos with AI Summaries on Discord",
  "tags": [],
  "nodes": [
    {
      "id": "48c87027-7eea-40b9-a73c-4e002b748783",
      "name": "YouTube Video Trigger",
      "type": "n8n-nodes-base.rssFeedReadTrigger",
      "position": [
        560,
        220
      ],
      "parameters": {
        "feedUrl": "https://www.youtube.com/feeds/videos.xml?channel_id=UC08Fah8EIryeOZRkjBRohcQ",
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "id": "56166228-b365-4043-b48c-098b4de71f6f",
      "name": "Retrieve Caption Data",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        780,
        220
      ],
      "parameters": {
        "url": "https://www.googleapis.com/youtube/v3/captions",
        "options": {},
        "sendQuery": true,
        "authentication": "predefinedCredentialType",
        "queryParameters": {
          "parameters": [
            {
              "name": "videoId",
              "value": "={{ $json.id.match(/(?:[^:]*:){2}\\s*(.*)/)[1] }}"
            },
            {
              "name": "part",
              "value": "snippet"
            }
          ]
        },
        "nodeCredentialType": "youTubeOAuth2Api"
      },
      "credentials": {
        "youTubeOAuth2Api": {
          "id": "uy3xy1Ks2ATwRGr4",
          "name": "Creator Magic - YouTube account"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "c029ac6f-3071-4045-83f6-2dede0c1f358",
      "name": "Download Captions",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1220,
        220
      ],
      "parameters": {
        "url": "=https://www.googleapis.com/youtube/v3/captions/{{ $json.caption.id }}",
        "options": {},
        "authentication":...

Output:
The node 'Download Captions' 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 'Download Captions'.


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": "d73e5113-119f-4e62-9872-48e6a971d760",
      "name": "Stop Interview?",
      "type": "n8n-nodes-base.if",
      "position": [
        3380,
        920
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "3cf788a6-94d0-4223-9caa-30b8e4df8e01",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $json.output.stop_interview }}",
              "rightValue": ""
            }
          ]
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "cda3c487-97fa-4037-b9a0-0802f4a02727",
      "name": "Generate Row",
      "type": "n8n-nodes-base.set",
      "position": [
        3740,
        1200
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "06146a75-b67a-42cf-aa6f-241f23c47b9a",
              "name": "timestamp",
              "type": "string",
              "value": "={{ $now.toISO() }}"
            },
            {
              "id": "b0278c64-58a7-487d-b7ba-d102fb5d4a0c",
              "name": "type",
              "type": "string",
              "value": "next_question"
            },
            {
              "id": "ba034ca1-408e-422f-b071-dab0ef12fb48",
              "name": "question",
              "type": "string",
              "value": "={{ $('Parse Response').item.json.output.question }}"
            },
            {
              "id": "a2231f6e-f507-408e-b598-53888cf8d4b5",
              "name": "answer",
              "type": "string",
              "value": "={{ $('Get Answer').item.json.answer }}"
         ...

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:
{
  "nodes": [
    {
      "id": "4dd52c72-9a9b-4db4-8de5-5b12b1e5c4be",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        180,
        1480
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "triggerAtHour": 9
            }
          ]
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "9226181c-b84c-4ea1-a5b4-eedb6c62037b",
      "name": "Search daily",
      "type": "n8n-nodes-base.airtable",
      "position": [
        440,
        1480
      ],
      "parameters": {
        "base": {
          "__rl": true,
          "mode": "list",
          "value": "appL3dptT6ZTSzY9v",
          "cachedResultUrl": "https://airtable.com/appL3dptT6ZTSzY9v",
          "cachedResultName": "Scheduled Emails"
        },
        "table": {
          "__rl": true,
          "mode": "list",
          "value": "tblzR9vSuFUzlQNMI",
          "cachedResultUrl": "https://airtable.com/appL3dptT6ZTSzY9v/tblzR9vSuFUzlQNMI",
          "cachedResultName": "Table 1"
        },
        "options": {},
        "operation": "search",
        "filterByFormula": "AND({Status} = 'active', {Interval} = 'daily')"
      },
      "credentials": {
        "airtableTokenApi": {
          "id": "Und0frCQ6SNVX3VV",
          "name": "Airtable Personal Access Token account"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "1a3b6224-2f66-41c6-8b3d-be286cf16370",
      "name": "Search weekly",
      "type": "n8n-nodes-base.airtable",
      "position": [
        440,
        1660
      ],
      "parameters": {
        "base": {
          "__rl": true,
          "mode": "list",
          "value": "appL3dptT6ZTSzY9v",
          "cachedResultUrl": "https://airtable.com/appL3dptT6ZTSzY9v",
          "cachedResultName": "Scheduled Emails"
        },
        "table": {
          "__rl": true,
          "mode": "list",
          "value": "tblzR9vSuFUzlQNMI",
          "cach...

Output:
The node 'Execute Workflow' 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 'Execute 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:
{
  "meta": {
    "instanceId": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9"
  },
  "nodes": [
    {
      "id": "76589d1c-45f3-4a89-906f-8ef300d34964",
      "name": "n8n Form Trigger",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        -2520,
        -280
      ],
      "webhookId": "5e7637dd-d222-4786-8cdc-7b66cebc1481",
      "parameters": {
        "path": "schedule_appointment",
        "options": {
          "ignoreBots": true,
          "appendAttribution": true,
          "useWorkflowTimezone": true
        },
        "formTitle": "Schedule an Appointment",
        "formFields": {
          "values": [
            {
              "fieldLabel": "Your Name",
              "placeholder": "eg. Sam Smith",
              "requiredField": true
            },
            {
              "fieldType": "email",
              "fieldLabel": "Email",
              "placeholder": "eg. sam@example.com",
              "requiredField": true
            },
            {
              "fieldType": "textarea",
              "fieldLabel": "Enquiry",
              "placeholder": "eg. I'm looking for...",
              "requiredField": true
            }
          ]
        },
        "formDescription": "Welcome to Jim's Appointment Form.\nBefore we set a date, please tell me a little about yourself and how I can help."
      },
      "typeVersion": 2.1
    },
    {
      "id": "194b7073-fa33-4e75-85ed-c02724c8075c",
      "name": "Form End",
      "type": "n8n-nodes-base.form",
      "position": [
        -420,
        -260
      ],
      "webhookId": "8fcc907b-bc2e-4fdf-a829-82c83e677724",
      "parameters": {
        "options": {
          "formTitle": "Appointment Request Sent!"
        },
        "operation": "completion",
        "completionTitle": "Appointment Request Sent!",
        "completionMessage": "=Thank you for submitting an appointment request. A confirmation of this request will be sent to your inbox. I'll get back to y...

Output:
The node 'Create Appointment' (type: n8n-nodes-base.googleCalendar) 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": {
  "googleCalendarOAuth2Api": {
    "id": "kWMxmDbMDDJoYFVK",
    "name": "Google Calendar 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 'Create Appointment' node.


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

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

Workflow JSON:
{
  "id": "Nvn78tMRNnKji7Fg",
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "Very simple Human in the loop system email with AI e IMAP",
  "tags": [],
  "nodes": [
    {
      "id": "271bb16f-9b62-41d9-ab76-114cd7ba915a",
      "name": "Email Trigger (IMAP)",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        -1300,
        1340
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "imap": {
          "id": "k31W9oGddl9pMDy4",
          "name": "IMAP info@n3witalia.com"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "42d150d8-d574-49f9-9c0e-71a2cdea3b79",
      "name": "Markdown",
      "type": "n8n-nodes-base.markdown",
      "position": [
        -1040,
        1340
      ],
      "parameters": {
        "html": "={{ $json.textHtml }}",
        "options": {}
      },
      "typeVersion": 1
    },
    {
      "id": "e9498a60-0078-4581-b269-7ff552f4047a",
      "name": "Send Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        920,
        1320
      ],
      "webhookId": "a79ae1b4-648c-4cb4-b6cd-04ea3c1d9314",
      "parameters": {
        "html": "={{ $('Set Email text').item.json.email }}",
        "options": {},
        "subject": "=Re: {{ $('Email Trigger (IMAP)').item.json.subject }}",
        "toEmail": "={{ $('Email Trigger (IMAP)').item.json.from }}",
        "fromEmail": "={{ $('Email Trigger (IMAP)').item.json.to }}"
      },
      "credentials": {
        "smtp": {
          "id": "hRjP3XbDiIQqvi7x",
          "name": "SMTP info@n3witalia.com"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "ab9f6ac3-2095-44df-aeba-2eab96ecf425",
      "name": "Email Summarization Chain",
      "type": "@n8n/n8n-nodes-langchain.chainSummarization",
      "position": [
        -780,
        1340
      ],
      "parameters": {
        "option...

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

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

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

**Solutions**:

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

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

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

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

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

Add rate limiting protection with Wait nodes and retry logic.


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

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

Workflow JSON:
{
  "id": "OuHrYOR3uWGmrhWQ",
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "AI Email processing autoresponder with approval (Yes/No)",
  "tags": [],
  "nodes": [
    {
      "id": "06a098db-160b-45f7-aeac-a73ef868148e",
      "name": "Email Trigger (IMAP)",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        -180,
        -100
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "imap": {
          "id": "k31W9oGddl9pMDy4",
          "name": "IMAP info@n3witalia.com"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "9589443b-efb7-4e0d-bafc-0be9858a4755",
      "name": "Markdown",
      "type": "n8n-nodes-base.markdown",
      "position": [
        40,
        -100
      ],
      "parameters": {
        "html": "={{ $json.textHtml }}",
        "options": {}
      },
      "typeVersion": 1
    },
    {
      "id": "8de7b2f3-bf75-4f3c-a1ee-eec047a7b82e",
      "name": "DeepSeek R1",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        240,
        80
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "deepseek/deepseek-r1:free",
          "cachedResultName": "deepseek/deepseek-r1:free"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "XJTqRiKFJpFs5MuX",
          "name": "OpenRouter account"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "babf37dc-99ca-439a-b094-91c52799b8df",
      "name": "Send Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        1840,
        -120
      ],
      "webhookId": "f84fcde7-6aac-485a-9a08-96a35955af49",
      "parameters": {
        "html": "={{ $('Write email').item.json.output }}",
        "options": {},
        "subject": "=Re: {{ $('Email Trigger (IMAP)'...

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": "03e9d14e9196363fe7191ce21dc0bb17387a6e755dcc9acc4f5904752919dca8"
  },
  "nodes": [
    {
      "id": "94dd7f48-0013-4fb5-89c4-826ecd7f2d66",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        1460,
        120
      ],
      "parameters": {
        "simple": false,
        "filters": {},
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "kkhNhqKpZt6IUZd0",
          "name": "Gmail"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "ca2023fa-ceca-4923-80e4-a3843803536c",
      "name": "Microsoft Outlook Trigger",
      "type": "n8n-nodes-base.microsoftOutlookTrigger",
      "disabled": true,
      "position": [
        1480,
        680
      ],
      "parameters": {
        "fields": [
          "body",
          "toRecipients",
          "subject",
          "bodyPreview"
        ],
        "output": "fields",
        "filters": {},
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "microsoftOutlookOAuth2Api": {
          "id": "vTCK0oVQ0WjFrI5H",
          "name": " Outlook Credential"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "1f011214-91a0-4cfa-9d9e-29864937c0a3",
      "name": "Screenshot HTML",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        2620,
        420
      ],
      "parameters": {
        "url": "https://hcti.io/v1/image",
        "method": "POST",
        "options": {},
        "sendBody": true,
        "sendQuery": true,
        "authentication": "genericCredentialType",
        "bodyParameters": {
          "parameters": [
            {
              "name": "html",
              "valu...

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: 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": "03e9d14e9196363fe7191ce21dc0bb17387a6e755dcc9acc4f5904752919dca8"
  },
  "nodes": [
    {
      "id": "1bad6bfc-9ec9-48a5-b8f7-73c4de3d08cf",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        1480,
        160
      ],
      "parameters": {
        "simple": false,
        "filters": {},
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "kkhNhqKpZt6IUZd0",
          "name": " Gmail"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "9ac747a1-4fd8-46ba-b4c1-75fd17aab2ed",
      "name": "Microsoft Outlook Trigger",
      "type": "n8n-nodes-base.microsoftOutlookTrigger",
      "disabled": true,
      "position": [
        1480,
        720
      ],
      "parameters": {
        "fields": [
          "body",
          "toRecipients",
          "subject",
          "bodyPreview"
        ],
        "output": "fields",
        "filters": {},
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "microsoftOutlookOAuth2Api": {
          "id": "vTCK0oVQ0WjFrI5H",
          "name": " Outlook Credential"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "5bf9b0e8-b84e-44a2-aad2-45dde3e4ab1b",
      "name": "Screenshot HTML",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        2520,
        480
      ],
      "parameters": {
        "url": "https://hcti.io/v1/image",
        "method": "POST",
        "options": {},
        "sendBody": true,
        "sendQuery": true,
        "authentication": "genericCredentialType",
        "bodyParameters": {
          "parameters": [
            {
              "name": "html",
              "val...

Output:
In node 'Upload Screenshot of Email to Jira', the parameter 'resource' contains an expression that references undefined data.

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

**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 'Upload Screenshot of Email to Jira' parameter 'resource'.


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:
{
  "nodes": [
    {
      "id": "2a41e2da-19f7-4c31-ab93-3a534db3179e",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        -360,
        -260
      ],
      "parameters": {
        "filters": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyX",
              "unit": "minutes",
              "value": 5
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "10LJ3tXKoUfexiKU",
          "name": "Gmail account"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "a25e0e42-8eab-49c5-a553-797da40eb623",
      "name": "OpenAI Chat Model1",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        -220,
        -60
      ],
      "parameters": {
        "options": {
          "maxTokens": 4096
        }
      },
      "credentials": {
        "openAiApi": {
          "id": "qR44iMsUYcLrhdR0",
          "name": "OpenAi account"
        }
      },
      "notesInFlow": false,
      "typeVersion": 1
    },
    {
      "id": "cf437748-a0df-42a2-b1ca-f93162d85bfe",
      "name": "Gmail - read labels",
      "type": "n8n-nodes-base.gmailTool",
      "position": [
        80,
        -40
      ],
      "webhookId": "d8ec9401-a9ff-4fe2-9c1e-5a8036cd96c9",
      "parameters": {
        "resource": "label",
        "returnAll": true,
        "descriptionType": "manual",
        "toolDescription": "Tool to read all existing gmail labels"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "10LJ3tXKoUfexiKU",
          "name": "Gmail account"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "152f1970-7a1f-4977-9c21-64b69242d3a9",
      "name": "Gmail - get message",
      "type": "n8n-nodes-base.gmailTool",
      "position": [
        260,
        -40
      ],
      "webhookId": "d8ec9401-a9ff-4fe2-9c1e-5a8036cd96c9",
      "parameters": {
        "messageId"...

Output:
The workflow has a broken data flow. The node 'Gmail - create label' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'Gmail - create label'.

**Impact**: Data from 'Gmail - create label' 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 'Gmail - create label' 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": {
  "Gmail - create label": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'Gmail - create label' to the workflow.


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": "2b1cc1a8b0a2fb9caab11ab2d5eb3712f9973066051b2e898cf4041a1f2a7757",
    "templateCredsSetupCompleted": true
  },
  "nodes": [
    {
      "id": "7786165e-5e74-4614-b065-86db19482b72",
      "name": "Format text with Markdown",
      "type": "n8n-nodes-base.markdown",
      "position": [
        -1200,
        980
      ],
      "parameters": {
        "html": "={{ $json.text }}",
        "options": {},
        "destinationKey": "textClean"
      },
      "typeVersion": 1,
      "continueOnFail": true
    },
    {
      "id": "8f73d4d6-2473-4fdf-8797-c049d6df6967",
      "name": "Lemlist Trigger - On new reply",
      "type": "n8n-nodes-base.lemlistTrigger",
      "position": [
        -1600,
        980
      ],
      "webhookId": "039bb443-8d2a-4eb3-9c16-772943a46db7",
      "parameters": {
        "event": "emailsReplied",
        "options": {
          "isFirst": true
        }
      },
      "typeVersion": 1
    },
    {
      "id": "1f94d672-0a70-45ad-bf96-72c4aecabcd0",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1700,
        680
      ],
      "parameters": {
        "width": 304.92548549441915,
        "height": 504.9663351162785,
        "content": "### Get your lemlist API key\n\n1. Go to your lemlist account or create one [HERE](https://app.lemlist.com/create-account)\n\n2. Go to Settings -> Integrations\n\n3. Generate your API Key and copy it\n\n4. On this node, click on create new credential and paste your API key"
      },
      "typeVersion": 1
    },
    {
      "id": "3032b04c-76a2-4f7c-a790-ede26b102254",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -2040,
        680
      ],
      "parameters": {
        "width": 319.6621253622332,
        "height": 507.1074887209538,
        "content": "# Read me\n\nThis workflow send email replies of your lemlist campaigns to the Slack channel of your choice.\n\nThe O...

Output:
The workflow has a broken data flow. The node 'Structured Output Parser' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'Structured Output Parser'.

**Impact**: Data from 'Structured Output Parser' 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 'Structured Output Parser' 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": {
  "Structured Output Parser": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'Structured Output Parser' to the workflow.


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:
{
  "nodes": [
    {
      "id": "a99b3164-fe36-4dde-9525-110c1ae08afb",
      "name": "Convert raw to base64",
      "type": "n8n-nodes-base.code",
      "position": [
        3320,
        580
      ],
      "parameters": {
        "mode": "runOnceForEachItem",
        "jsCode": "const encoded = Buffer.from($json.raw).toString('base64');\n\nreturn { encoded };"
      },
      "typeVersion": 2
    },
    {
      "id": "f0f731bd-7b2f-4c39-bc06-42fd57bc4ae8",
      "name": "Add email draft to thread",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        3580,
        580
      ],
      "parameters": {
        "url": "https://www.googleapis.com/gmail/v1/users/me/drafts",
        "method": "POST",
        "options": {},
        "jsonBody": "={\"message\":{\"raw\":\"{{ $json.encoded }}\", \"threadId\": \"{{ $('Map fields for further processing').item.json[\"threadId\"] }}\"}}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "gmailOAuth2"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "uBcIMfsTtKjexw7I",
          "name": "Gmail (workfloowstutorial@gmail.com)"
        }
      },
      "typeVersion": 4.1
    },
    {
      "id": "c1ce3400-4582-46c7-a85d-8fa9c325ff7b",
      "name": "Remove AI label from email",
      "type": "n8n-nodes-base.gmail",
      "position": [
        3820,
        580
      ],
      "parameters": {
        "resource": "thread",
        "threadId": "={{ $('Map fields for further processing').item.json[\"threadId\"] }}",
        "operation": "removeLabels"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "uBcIMfsTtKjexw7I",
          "name": "Gmail (workfloowstutorial@gmail.com)"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "65f0508a-ca2e-49ce-b02f-ef6505b5e983",
      "name": "Schedule trigger (1 min)",
      "type": "n8n-nodes-base.scheduleTrigger",
      "positi...

Output:
The node 'Build email raw' 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 'Build email raw'.


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": "04ab549d8bbb435ec33b81e4e29965c46cf6f0f9e7afe631018b5e34c8eead58"
  },
  "nodes": [
    {
      "id": "082d1828-72b1-48c0-8426-c8051c29f0db",
      "name": "Session",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -20,
        -20
      ],
      "parameters": {
        "url": "https://api.fastmail.com/jmap/session",
        "options": {},
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "3IRsYkeB2ofrwQjv",
          "name": "Fastmail"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "d7dc4c50-c8fc-4999-918d-5d357567ed14",
      "name": "Get Mailbox IDs",
      "type": "n8n-nodes-base.httpRequest",
      "notes": "https://api.fastmail.com/.well-known/jmap\n\nhttps://api.fastmail.com/jmap/session",
      "position": [
        200,
        -20
      ],
      "parameters": {
        "url": "https://api.fastmail.com/jmap/api/",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n \"using\": [\"urn:ietf:params:jmap:core\", \"urn:ietf:params:jmap:mail\"],\n \"methodCalls\": [\n [\n \"Mailbox/get\",\n {\n \"accountId\": \"{{ $('Session').item.json.primaryAccounts['urn:ietf:params:jmap:mail'] }}\"\n },\n \"c0\"\n ]\n ]\n }",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "headerParameters": {
          "parameters": [
            {
              "name": "Content-Type",
              "value": "application/json"
            },
            {
              "name": "Accept",
              "value": "application/json"
            }
          ]
        }
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "3IRsYkeB2ofrwQjv",
          "name": "Fastmail"
        }
      },
      "typeVersion": 4.2
    ...

Output:
The node 'Filter for drafts folder' 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 'Filter for drafts folder'.


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": "nkPjDxMrrkKbgHaV"
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "Effortless Email Management with AI",
  "tags": [],
  "nodes": [
    {
      "id": "9d77e26f-de2b-4bd4-b0f0-9924a8f459a6",
      "name": "Email Trigger (IMAP)",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        -2000,
        -180
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "imap": {
          "id": "k31W9oGddl9pMDy4",
          "name": "IMAP info@n3witalia.com"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "cf2d020b-b125-4a20-8694-8ed0f7acf755",
      "name": "Markdown",
      "type": "n8n-nodes-base.markdown",
      "position": [
        -1740,
        -180
      ],
      "parameters": {
        "html": "={{ $json.textHtml }}",
        "options": {}
      },
      "typeVersion": 1
    },
    {
      "id": "41bfceff-0155-4643-be60-ee301e2d69e1",
      "name": "Send Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        400,
        -320
      ],
      "webhookId": "a79ae1b4-648c-4cb4-b6cd-04ea3c1d9314",
      "parameters": {
        "html": "={{ $('Edit Fields').item.json.email }}",
        "options": {},
        "subject": "=Re: {{ $('Email Trigger (IMAP)').item.json.subject }}",
        "toEmail": "={{ $('Email Trigger (IMAP)').item.json.from }}",
        "fromEmail": "={{ $('Email Trigger (IMAP)').item.json.to }}"
      },
      "credentials": {
        "smtp": {
          "id": "hRjP3XbDiIQqvi7x",
          "name": "SMTP info@n3witalia.com"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "2aff581a-8b64-405c-b62f-74bf189fd7b1",
      "name": "Qdrant Vector Store",
      "type": "@n8n/n8n-nodes-langchain.vectorStoreQdrant",
      "position": [
        -320,
        600
      ],
      "parameters": {
        "mode": "retrieve-as-tool",
        "opti...

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:
{
  "id": "M8oLW9Qd59zNJzg2",
  "meta": {
    "instanceId": "1abe0e4c2be794795d12bf72aa530a426a6f87aabad209ed6619bcaf0f666fb0",
    "templateCredsSetupCompleted": true
  },
  "name": "Email Summary Agent",
  "tags": [
    {
      "id": "G1v7CnFpOHsReVhM",
      "name": "Product",
      "createdAt": "2025-01-13T17:04:34.969Z",
      "updatedAt": "2025-01-13T17:04:34.969Z"
    },
    {
      "id": "RagrXIh5iBDseqvj",
      "name": "AI",
      "createdAt": "2025-01-09T09:18:12.756Z",
      "updatedAt": "2025-01-09T09:18:12.756Z"
    },
    {
      "id": "Yg2lfYteJZAoIeaC",
      "name": "Building blocks",
      "createdAt": "2025-01-13T17:05:49.788Z",
      "updatedAt": "2025-01-13T17:05:49.788Z"
    },
    {
      "id": "ZuS1C3NpE8uBlFq4",
      "name": "Finance",
      "createdAt": "2025-01-13T17:05:03.996Z",
      "updatedAt": "2025-01-13T17:05:03.996Z"
    },
    {
      "id": "aqlZb2qfWiaT4Xr5",
      "name": "IT Ops",
      "createdAt": "2025-01-03T12:20:11.917Z",
      "updatedAt": "2025-01-03T12:20:11.917Z"
    },
    {
      "id": "fX8hRnEv4D8sLSzF",
      "name": "OpenAI",
      "createdAt": "2025-01-09T09:18:12.757Z",
      "updatedAt": "2025-01-09T09:18:12.757Z"
    },
    {
      "id": "j1qBXzFADkR3sHSa",
      "name": "Marketing",
      "createdAt": "2025-01-13T17:03:54.468Z",
      "updatedAt": "2025-01-13T17:03:54.468Z"
    },
    {
      "id": "x3OVvOuZkLx1hYpW",
      "name": "Support",
      "createdAt": "2025-01-13T17:05:40.900Z",
      "updatedAt": "2025-01-13T17:05:40.900Z"
    },
    {
      "id": "xBOhq1kP3lza5ajE",
      "name": "HR",
      "createdAt": "2025-01-13T17:04:57.045Z",
      "updatedAt": "2025-01-13T17:04:57.045Z"
    },
    {
      "id": "yy04JQqCaXepPdSa",
      "name": "Project Management",
      "createdAt": "2024-10-30T18:27:57.309Z",
      "updatedAt": "2024-10-30T18:27:57.309Z"
    },
    {
      "id": "zJaZorWWcGpTp35U",
      "name": "DevOps",
      "createdAt": "2025-01-03T12:19:34.273Z",
      "updatedAt": "2025-01-03T12:...

Output:
The node 'Fetch Emails - Past 24 Hours' 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 'Fetch Emails - Past 24 Hours'.