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:
{
  "nodes": [
    {
      "name": "On clicking 'execute':
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "37aa39fe-f590-427d-b3cc-c2ae34136528",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Get Local Datetime",
      "type": "n8n-nodes-base.function",
      "position": [
        450,
        300
      ],
      "parameters": {
        "functionCode": "const moment = require('moment');\n\nlet date = moment().tz($env['GENERIC_TIMEZONE']);\n\nlet year = date.year();\nlet month = date.month(); // zero-indexed!\nlet day = date.date();\nlet hour = date.hours();\nlet minute = date.minutes();\nlet second = date.seconds();\nlet millisecond = date.millisecond();\nlet formatted = date.format('YYYY-MM-DD HH:mm:ss.SSS Z');\n\nreturn [\n  {\n    json: {\n      utc: date,\n      year: year,\n      month: month, // zero-indexed!\n      day: day,\n      hour: hour,\n      minute: minute,\n      second: second,\n      millisecond: millisecond,\n      formatted: formatted\n    }\n  }\n];\n"
      },
      "typeVersion": 1,
      "id": "f2f3b367-e2ae-4538-96c9-18a050b3726e",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-e5294908",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "connections": {},
  "name": "Manualtrigger Workflow",
  "description": "Automated workflow: Manualtrigger Workflow. This workflow processes data and performs automated tasks.",
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": ...

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


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": "69",
  "name": "Create, update, and get an issue on Taiga",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        430,
        260
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "56a5fd20-c264-4398-bd4d-14a6e9e7725b",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Taiga",
      "type": "n8n-nodes-base.taiga",
      "position": [
        630,
        260
      ],
      "parameters": {
        "subject": "n8n-docs",
        "projectId": 385605,
        "additionalFields": {}
      },
      "credentials": {
        "taigaCloudApi": "taiga"
      },
      "typeVersion": 1,
      "id": "c711ef55-f922-4fa3-9f6e-8f312e14a3d2",
      "notes": "This taiga node performs automated tasks as part of the workflow."
    },
    {
      "name": "Taiga1",
      "type": "n8n-nodes-base.taiga",
      "position": [
        830,
        260
      ],
      "parameters": {
        "issueId": "={{$node[\"Taiga\"].json[\"id\"]}}",
        "operation": "update",
        "projectId": "={{$node[\"Taiga\"].json[\"project\"]}}",
        "updateFields": {
          "description": "This ticket is for the documentation for the Taiga node"
        }
      },
      "credentials": {
        "taigaCloudApi": "taiga"
      },
      "typeVersion": 1,
      "id": "27d897d3-93bf-4c72-8d1a-13815cbbbbb8",
      "notes": "This taiga node performs automated tasks as part of the workflow."
    },
    {
      "name": "Taiga2",
      "type": "n8n-nodes-base.taiga",
      "position": [
        1030,
        260
      ],
      "parameters": {
        "issueId": "={{$node[\"Taiga\"].json[\"id\"]}}",
        "operation": "get"
      },
      "credentials": {
        "taigaCloudApi": "taiga"
      },
      "typeVersion": 1,
      "id": "65fee518-64c7-466d-8eb3-74a483e70f6b",
      "notes": "This taiga node performs automated tasks as part ...

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: 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:
{
  "name": "Manualtrigger Workflow",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        450,
        450
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "228b7813-3598-4900-853c-49454ae9608f",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Wekan",
      "type": "n8n-nodes-base.wekan",
      "position": [
        650,
        450
      ],
      "parameters": {
        "owner": "c4nzTEvSwGPBxKTCc",
        "title": "Documentation",
        "resource": "board",
        "additionalFields": {}
      },
      "credentials": {
        "wekanApi": "wekan-trial"
      },
      "typeVersion": 1,
      "id": "236d2645-5379-4d44-9800-892ffe24228c",
      "notes": "This wekan node performs automated tasks as part of the workflow."
    },
    {
      "name": "Wekan1",
      "type": "n8n-nodes-base.wekan",
      "position": [
        850,
        450
      ],
      "parameters": {
        "title": "To Do",
        "boardId": "={{$node[\"Wekan\"].json[\"_id\"]}}",
        "resource": "list"
      },
      "credentials": {
        "wekanApi": "wekan-trial"
      },
      "typeVersion": 1,
      "id": "90418dda-2d12-4ce6-ae46-696caf51f74a",
      "notes": "This wekan node performs automated tasks as part of the workflow."
    },
    {
      "name": "Wekan2",
      "type": "n8n-nodes-base.wekan",
      "position": [
        1050,
        450
      ],
      "parameters": {
        "title": "Done",
        "boardId": "={{$node[\"Wekan\"].json[\"_id\"]}}",
        "resource": "list"
      },
      "credentials": {
        "wekanApi": "wekan-trial"
      },
      "typeVersion": 1,
      "id": "a671c5f1-7411-457d-9582-22422acddf10",
      "notes": "This wekan node performs automated tasks as part of the workflow."
    },
    {
      "name": "Wekan3",
      "type": "n8n-nodes-base.wekan",
      "position": [
        12...

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: 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": "7604ck94MeYXMHpN",
  "meta": {
    "instanceId": "workflow-31ff5377",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.686459",
    "updatedAt": "2025-09-29T07:07:49.686472",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Read RSS feed from two different sources",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "fa8717e5-092a-4359-89cc-57cc8fa2bf25",
      "name": "RSS Feed Read",
      "type": "n8n-nodes-base.rssFeedRead",
      "position": [
        1080,
        180
      ],
      "parameters": {
        "url": "={{ $items[999].json.value }}",
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This rssFeedRead node performs automated tasks as part of the workflow."
    },
    {
      "id": "62ce6cf3-fb83-4013-b288-40d179f35f99",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        520,
        100
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "81496a04-b986-4e13-b884-23562f953a37",
      "name": "Code",
      "type": "n8n-nodes-base.code",
      "position": [
        700,
        100
      ],
      "parameters": {
        "jsCode": "return [\n  {\n    json: {\n      url: '{{ $env.WEBHOOK_URL }}',\n    }\n  },\n  {\n    json: {\n      url: '{{ $env.WEBHOOK_URL }}',\n    }\n  }\n];"
      },
      "typeVersion": 1,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "6e3a444f-fec3-4a7f-a063-d5b152c5f43a",
      "name": "Loop Over Items",
      "type": "n8n-nodes-base.splitInBatches",
      "position": [
        880,
        100
      ],
      "parameters": {
   ...

Output:
In node 'RSS Feed Read', the parameter 'url' contains an expression that references undefined data.

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

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

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

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

Fix the expression in 'RSS Feed Read' parameter 'url'.


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

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

Workflow JSON:
{
  "id" "76",
  "name": "Create a project, tag, and time entry, and update the time entry in Clockify",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "f9bfe11c-b110-4937-b48a-cce408c64fe6",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Clockify",
      "type": "n8n-nodes-base.clockify",
      "position": [
        450,
        300
      ],
      "parameters": {
        "name": "n8n-docs",
        "workspaceId": "5f7af249d33ce12a712306dd",
        "additionalFields": {
          "note": "For n8n-docs",
          "color": "#0000FF",
          "isPublic": false
        }
      },
      "credentials": {
        "clockifyApi": "clockify-burner"
      },
      "typeVersion": 1,
      "id": "c2caa017-f2ff-40f8-8e9d-a7a60b38f6f5",
      "notes": "This clockify node performs automated tasks as part of the workflow."
    },
    {
      "name": "Clockify1",
      "type": "n8n-nodes-base.clockify",
      "position": [
        650,
        300
      ],
      "parameters": {
        "name": "docs",
        "resource": "tag",
        "workspaceId": "5f7af249d33ce12a712306dd"
      },
      "credentials": {
        "clockifyApi": "clockify-burner"
      },
      "typeVersion": 1,
      "id": "91500f35-0690-4ef3-8fc8-669009671a96",
      "notes": "This clockify node performs automated tasks as part of the workflow."
    },
    {
      "name": "Clockify2",
      "type": "n8n-nodes-base.clockify",
      "position": [
        850,
        300
      ],
      "parameters": {
        "start": "2020-10-05T08:30:00.000Z",
        "resource": "timeEntry",
        "workspaceId": "5f7af249d33ce12a712306dd",
        "additionalFields": {
          "end": "2020-10-05T09:30:00.000Z",
          "tagIds": [
            "5f7afbfc73610f56b88ee9ef"
          ]...

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: 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": "7",
  "name": "Manualtrigger Workflow",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        440,
        320
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "933e5aaf-31aa-43f7-8785-04cd39638862",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Hubspot",
      "type": "n8n-nodes-base.hubspot",
      "position": [
        750,
        320
      ],
      "parameters": {
        "resource": "contact",
        "operation": "getAll",
        "returnAll": true,
        "additionalFields": {}
      },
      "typeVersion": 1,
      "id": "ca267e44-7161-46cd-a6f6-4ca5920be4e9",
      "notes": "This hubspot node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-30cbf0c6",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Manualtrigger Workflow. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-f37fadab",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.695220",
    "updatedAt": "2025-09-29T07:07:49.695229",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",
    "p...

Output:
The node 'Hubspot' (type: n8n-nodes-base.hubspot) 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": {
  "hubspotApi": "scsc"
}
```

**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 'Hubspot' node.


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

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

Workflow JSON:
{
  "id": "7",
  "name": "Publish post to a publication",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        600,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "6c0abc94-b172-4314-9be7-e31e07b17d5c",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Medium",
      "type": "n8n-nodes-base.medium",
      "position": [
        800,
        300
      ],
      "parameters": {
        "title": "",
        "content": "",
        "publication": true,
        "contentFormat": "",
        "publicationId": "",
        "additionalFields": {}
      },
      "credentials": {
        "mediumApi": "medium"
      },
      "typeVersion": 1,
      "id": "3ab286a3-383f-4a48-86d4-c2594509c67c",
      "notes": "This medium node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-650aa6c6",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {},
        "_injected_number_field": "not_a_number"
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Publish post to a publication. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-923ee010",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.696534",
    "updatedAt": "2025-09-29T07:07:49.696540",
    "owner": "n8n-user",
    "license": "MIT...

Output:
The node 'Error Handler' 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 'Error Handler'.


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": "82",
  "name": "Create a new list, add a new contact to the list, update the contact, and get all contacts in the...",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        290,
        260
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "ea0b03e4-e930-4bb3-8fef-b3352a2cf1a4",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Automizy",
      "type": "n8n-nodes-base.automizy",
      "position": [
        490,
        260
      ],
      "parameters": {
        "name": "n8n-docs",
        "resource": "list"
      },
      "credentials": {
        "automizyApi": "automizy"
      },
      "typeVersion": 1,
      "id": "4461826b-00d1-4741-afd0-4a69bd823065",
      "notes": "This automizy node performs automated tasks as part of the workflow."
    },
    {
      "name": "Automizy1",
      "type": "n8n-nodes-base.automizy",
      "position": [
        690,
        260
      ],
      "parameters": {
        "email": "example@n8n.io",
        "listId": "={{$node[\"Automizy\"].json[\"id\"]}}",
        "additionalFields": {
          "status": "ACTIVE"
        }
      },
      "credentials": {
        "automizyApi": "automizy"
      },
      "typeVersion": 1,
      "id": "7aa7a572-945a-4a2d-b89c-dd5b09a8e3a8",
      "notes": "This automizy node performs automated tasks as part of the workflow."
    },
    {
      "name": "Automizy2",
      "type": "n8n-nodes-base.automizy",
      "position": [
        890,
        260
      ],
      "parameters": {
        "email": "={{$node[\"Automizy1\"].json[\"email\"]}}",
        "operation": "update",
        "updateFields": {
          "tags": [
            "reviewer"
          ]
        }
      },
      "credentials": {
        "automizyApi": "automizy"
      },
      "typeVersion": 1,
      "id": "d8a19ed0-43ef-41da-8da0-292dcc1ee07a",
      "notes": "This aut...

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

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

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

**Solutions**:

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

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

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

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

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

Add validation for empty or null input data.


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

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

Workflow JSON:
{
  "id": "83",
  "name": "Create a room, invite members from a different room, and send a message in the room we created",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "ffc8126c-a1ce-4206-9dee-59d65f759390",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Matrix",
      "type": "n8n-nodes-base.matrix",
      "position": [
        400,
        300
      ],
      "parameters": {
        "resource": "room",
        "roomName": "n8n",
        "roomAlias": "discussion-n8n"
      },
      "credentials": {
        "matrixApi": "matrix"
      },
      "typeVersion": 1,
      "id": "15e8718e-f0d7-4450-bc78-f52d68844ba3",
      "notes": "This matrix node performs automated tasks as part of the workflow."
    },
    {
      "name": "If Node",
      "type": "n8n-nodes-base.if",
      "position": [
        840,
        300
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{$node[\"Matrix1\"].json[\"user_id\"]}}",
              "value2": "={{$node[\"Matrix2\"].json[\"user_id\"]}}",
              "operation": "notEqual"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "77d16cb9-f8a8-4822-a1d9-5946611ad70a",
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "name": "Matrix3",
      "type": "n8n-nodes-base.matrix",
      "position": [
        990,
        200
      ],
      "parameters": {
        "roomId": "={{$node[\"Matrix\"].json[\"room_id\"]}}",
        "userId": "={{$node[\"IF\"].json[\"user_id\"]}}",
        "resource": "room",
        "operation": "invite"
      },
      "credentials": {
        "matrixApi": "matrix"
      },
      "typeVersion": 1,
      "id": "85bf2439-7f8d-49c7-81ae-90...

Output:
The node 'Matrix4' (type: n8n-nodes-base.matrix) 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": {
  "matrixApi": "matrix"
}
```

**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 'Matrix4' node.


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

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

Workflow JSON:
{
  "id": "83",
  "name": "Creating a meeting with the Zoom node",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "9b3f06d2-59c2-4c5d-8f25-242fdf266e31",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Zoom",
      "type": "n8n-nodes-base.zoom",
      "position": [
        450,
        300
      ],
      "parameters": {
        "topic": "Something",
        "authentication": "{{ $credentials. }}",
        "additionalFields": {}
      },
      "credentials": {
        "zoomOAuth2Api": ""
      },
      "typeVersion": 1,
      "id": "3488ec3a-9d2a-4315-9d4e-9923a3fcf6e1",
      "notes": "This zoom node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-e048e880",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {},
        "_injected_number_field": "not_a_number"
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Creating a meeting with the Zoom node. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-e42b84bd",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.706670",
    "updatedAt": "2025-09-29T07:07:49.706699",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "statu...

Output:
The node 'Error Handler' 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.


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": "84",
  "name": "Get a pipeline in CircleCI",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "856a9f66-316a-43a4-9d8c-f64950ce8702",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "CircleCI",
      "type": "n8n-nodes-base.circleCi",
      "position": [
        450,
        300
      ],
      "parameters": {
        "vcs": "",
        "projectSlug": ""
      },
      "credentials": {
        "circleCiApi": ""
      },
      "typeVersion": 1,
      "id": "b00c1434-3cc8-4e77-a731-8184b70a8237",
      "notes": "This circleCi node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-67929574",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "={{ $items[999].json.value }}",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Get a pipeline in CircleCI. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-ba8d317f",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.713234",
    "updatedAt": "2025-09-29T07:07:49.713245",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",
    "p...

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

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

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

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

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

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "85",
  "name": "Sending an SMS with MessageBird",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "8832742f-bb2e-4247-babc-e1fef154d330",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "MessageBird",
      "type": "n8n-nodes-base.messageBird",
      "position": [
        450,
        300
      ],
      "parameters": {
        "message": "",
        "originator": "",
        "recipients": "={{ $items[999].json.value }}",
        "additionalFields": {}
      },
      "credentials": {
        "messageBirdApi": ""
      },
      "typeVersion": 1,
      "id": "3816b3ec-8419-450d-8404-77b700ecd835",
      "notes": "This messageBird node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-9af517f1",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Sending an SMS with MessageBird. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-3d1541b1",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.719744",
    "updatedAt": "2025-09-29T07:07:49.719759",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
 ...

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

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

**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 'MessageBird' parameter 'recipients'.


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": "87"
  "name": "Create a new issue in Jira",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        350,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "461db607-c45a-46fb-9ae5-d663dfe339a8",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Jira",
      "type": "n8n-nodes-base.jira",
      "position": [
        550,
        300
      ],
      "parameters": {
        "project": "",
        "summary": "Firewall on fire",
        "issueType": "10001",
        "additionalFields": {}
      },
      "credentials": {
        "jiraSoftwareCloudApi": ""
      },
      "typeVersion": 1,
      "id": "61010d47-e810-4182-b1da-6b7c28125ab3",
      "notes": "This jira node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-f183c4af",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create a new issue in Jira. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-d165de1a",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.713981",
    "updatedAt": "2025-09-29T07:07:49.713991",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environmen...

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: 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": "88",
  "name": "Get the current weather data for a city",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "078c487e-b456-4bd4-b62c-6628fc52d0ed",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "OpenWeatherMap",
      "type": "n8n-nodes-base.openWeatherMap",
      "position": [
        450,
        300
      ],
      "parameters": {
        "cityName": "={{ $env.UNDEFINED_ENV_VAR }}"
      },
      "credentials": {
        "openWeatherMapApi": ""
      },
      "typeVersion": 1,
      "id": "84eb183e-2bf6-477d-86df-69b78ec5d27e",
      "notes": "This openWeatherMap node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-65463e44",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Get the current weather data for a city. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-c91a06d7",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.726285",
    "updatedAt": "2025-09-29T07:07:49.726301",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
...

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

**Faulty Expression**: `={{ $env.UNDEFINED_ENV_VAR }}`
**Original Value**: `berlin,de`

**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 'OpenWeatherMap' parameter 'cityName'.


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": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        320
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "302cc04d-5d9e-42d5-8225-d9894cce7c25",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Spreadsheet File",
      "type": "n8n-nodes-base.spreadsheetFile",
      "position": [
        650,
        320
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 1,
      "id": "59d01572-3de1-406e-8ad9-a857d0285897",
      "notes": "This spreadsheetFile node performs automated tasks as part of the workflow."
    },
    {
      "name": "Read Binary File",
      "type": "n8n-nodes-base.readBinaryFile",
      "position": [
        450,
        320
      ],
      "parameters": {
        "filePath": "/data/sample_spreadsheet.csv"
      },
      "typeVersion": 1,
      "id": "83ab8f9e-74b6-4e10-99dd-a45d0b43b867",
      "notes": "This readBinaryFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-94f6088c",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {},
        "_injected_number_field": "not_a_number"
      }
    }
  ],
  "connections": {},
  "name": "Manualtrigger Workflow",
  "description": "Automated workflow: Manualtrigger Workflow. This workflow processes data and performs automated tasks.",
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "meta": {
    "instanceId": "workfl...

Output:
The node 'Error Handler' 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.


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": "89",
  "name": "Create a new card in Trello",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "afbfe341-e4b8-457d-9709-88c41812a5e6",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Trello",
      "type": "n8n-nodes-base.trello",
      "position": [
        450,
        300
      ],
      "parameters": {
        "name": "={{ $env.UNDEFINED_ENV_VAR }}",
        "listId": "",
        "description": "Here are some details",
        "additionalFields": {}
      },
      "credentials": {
        "trelloApi": ""
      },
      "typeVersion": 1,
      "id": "6dae9e39-4b9c-41c8-bcb7-89c3e337094c",
      "notes": "This trello node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-e98236bb",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create a new card in Trello. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-6650ef02",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.728834",
    "updatedAt": "2025-09-29T07:07:49.728846",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority"...

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

**Faulty Expression**: `={{ $env.UNDEFINED_ENV_VAR }}`
**Original Value**: `Hello`

**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 'Trello' parameter 'name'.


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": "8",
  "name": "Sample Spotify",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        500,
        310
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "26b84b9c-26c9-4096-9e40-76e221ce211b",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Spotify",
      "type": "n8n-nodes-base.spotify",
      "position": [
        780,
        310
      ],
      "parameters": {
        "id": "spotify:track:6SPOM20nWbQSBvTwzgIzqg"
      },
      "credentials": {
        "spotifyOAuth2Api": "spotifyOAuth2"
      },
      "typeVersion": 1,
      "id": "661eaa8b-70ff-41aa-811e-fd8cf659272b",
      "notes": "This spotify node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-2f5d8b8d",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "={{ $node.NonExistentNode.json.data }}",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Sample Spotify. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-31e3ff08",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.715165",
    "updatedAt": "2025-09-29T07:07:49.715201",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",...

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

**Faulty Expression**: `={{ $node.NonExistentNode.json.data }}`
**Original Value**: `Workflow execution error`

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

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

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


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" "8jdT4wXjV5NljqKa",
  "meta": {
    "instanceId": "workflow-ebd586b1",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.720664",
    "updatedAt": "2025-09-29T07:07:49.720679",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Enhance Chat Responses with Real-Time Search Data via Bright Data & Gemini AI",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "7294b048-5804-4620-a53e-52df293c3df1",
      "name": "When chat message received",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -460,
        160
      ],
      "webhookId": "3ad383ee-ded9-4a46-9165-9af0bad6c450",
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.1,
      "notes": "This chatTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "8ff09a26-ffa4-451d-9452-35b8f2936cab",
      "name": "AI Agent",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -140,
        60
      ],
      "parameters": {
        "options": {
          "systemMessage": "You are a helpful assistant.\n\nUse MCP Search Engine assistant tools for Bright Data for Google, Bing or Yandex Search. \n\nImportant: Return the response to Chat and also perform the webhook notification of responses.\n\nUse the relevant tool in the order of execution. "
        }
      },
      "typeVersion": 1.8,
      "notes": "This agent node performs automated tasks as part of the workflow."
    },
    {
      "id": "92352366-7fe5-407d-aa34-96ac19b13284",
      "name": "Google Gemini Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -240,
        280
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-2.0-flash-exp"
      },
      "credentials": {
        "googlePalmApi": {
 ...

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: 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": "90",
  "name": "Post a message to a channel in RocketChat",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "2fc8824a-13b3-483b-b948-efbcfc6f3d75",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Rocketchat",
      "type": "n8n-nodes-base.rocketchat",
      "position": [
        450,
        300
      ],
      "parameters": {
        "text": "Hello everyone",
        "channel": "#general",
        "options": {},
        "attachments": []
      },
      "credentials": {
        "rocketchatApi": "Rocket"
      },
      "typeVersion": 1,
      "id": "7cf49026-1a8e-4643-8382-8ff3e9ed371a",
      "notes": "This rocketchat node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-4e420b44",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Post a message to a channel in RocketChat. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-c8294e67",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.739318",
    "updatedAt": "2025-09-29T07:07:49.739342",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "91",
  "name": "Create a new user in Intercom",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        600,
        250
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "240f4415-0b0b-40ea-9106-d2849098700d",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Intercom",
      "type": "n8n-nodes-base.intercom",
      "position": [
        800,
        250
      ],
      "parameters": {
        "idValue": "",
        "identifierType": "email",
        "additionalFields": {}
      },
      "credentials": {
        "intercomApi": ""
      },
      "typeVersion": 1,
      "id": "eb0b711f-2d07-4e51-87c1-43459fdc8f20",
      "notes": "This intercom node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-d6af7c00",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create a new user in Intercom. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-48b91a54",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.740560",
    "updatedAt": "2025-09-29T07:07:49.740574",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "3421ab6b-f2bf-4148-af10-49622b5cbc0b",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "SecurityScorecard",
      "type": "n8n-nodes-base.securityScorecard",
      "position": [
        450,
        300
      ],
      "parameters": {
        "report": "full-scorecard-json",
        "resource": "report",
        "operation": "generate",
        "scorecardIdentifier": "n8n.io"
      },
      "credentials": {
        "securityScorecardApi": "SecurityScorecard Credentials"
      },
      "typeVersion": 1,
      "id": "2abd81cf-0066-4934-9650-fd4f92fc7c2e",
      "notes": "This securityScorecard node performs automated tasks as part of the workflow."
    },
    {
      "name": "SecurityScorecard1",
      "type": "n8n-nodes-base.securityScorecard",
      "position": [
        650,
        300
      ],
      "parameters": {
        "limit": 1,
        "resource": "report"
      },
      "credentials": {
        "securityScorecardApi": "SecurityScorecard Credentials"
      },
      "typeVersion": 1,
      "id": "f0463fcb-3ff1-4041-ac24-7bb376c7dd2f",
      "notes": "This securityScorecard node performs automated tasks as part of the workflow."
    },
    {
      "name": "SecurityScorecard2",
      "type": "n8n-nodes-base.securityScorecard",
      "position": [
        850,
        300
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "resource": "report",
        "operation": "download"
      },
      "credentials": {
        "securityScorecardApi": "SecurityScorecard Credentials"
      },
      "typeVersion": 1,
      "id": "9e2c7897-4705-40bf-8664-1f61a3b8b557",
      "notes": "This securityScorecard node performs automated tasks as part of the workflow."
    ...

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.


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:
{
  "nodes": [
    {
      "name": "On clicking 'execute'"
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        340
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "7e6c1421-b8bb-46f9-909d-448e13e8b992",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Reddit",
      "type": "n8n-nodes-base.reddit",
      "position": [
        470,
        340
      ],
      "parameters": {
        "text": "This post was created using the Reddit node in n8n",
        "title": "Created from n8n",
        "subreddit": "n8n"
      },
      "credentials": {
        "redditOAuth2Api": "Reddit OAuth Credentials"
      },
      "typeVersion": 1,
      "id": "04f92192-c168-4a48-b5ff-b928981daf29",
      "notes": "This reddit node performs automated tasks as part of the workflow."
    },
    {
      "name": "Reddit1",
      "type": "n8n-nodes-base.reddit",
      "position": [
        670,
        340
      ],
      "parameters": {
        "postId": "={{$json[\"id\"]}}",
        "operation": "get",
        "subreddit": "={{$node[\"Reddit\"].parameter[\"subreddit\"]}}"
      },
      "credentials": {
        "redditOAuth2Api": "Reddit OAuth Credentials"
      },
      "typeVersion": 1,
      "id": "bcb0cee6-fe70-4d6a-9338-3199508d5be8",
      "notes": "This reddit node performs automated tasks as part of the workflow."
    },
    {
      "name": "Reddit2",
      "type": "n8n-nodes-base.reddit",
      "position": [
        870,
        340
      ],
      "parameters": {
        "postId": "={{$json[\"id\"]}}",
        "resource": "postComment",
        "commentText": "This comment was added from n8n!"
      },
      "credentials": {
        "redditOAuth2Api": "Reddit OAuth Credentials"
      },
      "typeVersion": 1,
      "id": "66025997-37f0-4146-9d8d-1aea5e789ef4",
      "notes": "This reddit node performs automated tasks as part of the workflow."
    },
    {
      "i...

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


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": "92",
  "name": "Sending an SMS using sms77",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "5787303b-bd98-4770-9fad-532d68a61f3b",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Sms77",
      "type": "n8n-nodes-base.sms77",
      "position": [
        450,
        300
      ],
      "parameters": {
        "message": "Hello from n8n!"
      },
      "credentials": {
        "sms77Api": ""
      },
      "typeVersion": 1,
      "id": "083bae31-803b-418f-a417-6c8980d214d7",
      "notes": "This sms77 node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-b130392f",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Sending an SMS using sms77. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-a5a95251",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.750626",
    "updatedAt": "2025-09-29T07:07:49.750644",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "ex...

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:
{
  "id": "92",
  "name": "Translate text from English to German",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "3edc3c3a-82bb-4753-b253-1c9e683f42ea",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Translate",
      "type": "n8n-nodes-base.googleTranslate",
      "position": [
        470,
        300
      ],
      "parameters": {
        "text": "Hello from n8n!",
        "translateTo": "de",
        "authentication": "{{ $credentials.oAuth2 }}"
      },
      "credentials": {
        "googleTranslateOAuth2Api": "google-translate"
      },
      "typeVersion": 1,
      "id": "1c99224a-ffd3-4fdf-bc50-9463aed3bb9a",
      "notes": "This googleTranslate node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-bae6c963",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {},
        "_injected_number_field": "not_a_number"
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Translate text from English to German. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-50b9d965",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.761960",
    "updatedAt": "2025-09-29T07:07:49.761972",
    "owner": "n8n-...

Output:
The node 'Error Handler' 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.


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": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        310,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "d168d22c-1e83-43d6-ba9d-1c3bc5dd65f2",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Peekalink",
      "type": "n8n-nodes-base.peekalink",
      "position": [
        510,
        300
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "operation": "isAvailable"
      },
      "credentials": {
        "peekalinkApi": "Peekalink API Credentials"
      },
      "typeVersion": 1,
      "id": "db336ca0-935f-43c9-9672-55dec0e6d599",
      "notes": "This peekalink node performs automated tasks as part of the workflow."
    },
    {
      "name": "If Node",
      "type": "n8n-nodes-base.if",
      "position": [
        710,
        300
      ],
      "parameters": {
        "conditions": {
          "string": [],
          "boolean": [
            {
              "value1": "={{$json[\"isAvailable\"]}}",
              "value2": true
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "93bcb45a-351e-4411-a14b-4f4d570f9249",
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "name": "Peekalink1",
      "type": "n8n-nodes-base.peekalink",
      "position": [
        910,
        200
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "_injected_number_field": "not_a_number"
      },
      "credentials": {
        "peekalinkApi": "Peekalink API Credentials"
      },
      "typeVersion": 1,
      "id": "e2408fac-857d-48ff-92fe-de328ad813b5",
      "notes": "This peekalink node performs automated tasks as part of the workflow."
    },
    {
      "name": "NoOp",
      "type": "n8n-nodes-base.noOp",
      "position": [
        910,
        400
      ],
      "param...

Output:
The node 'Peekalink1' 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 'Peekalink1'.


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": [
    {
      "name": "Tapfiliate2",
      "type": "n8n-nodes-base.tapfiliate",
      "position": [
        870,
        300
      ],
      "parameters": {
        "resource": "programAffiliate",
        "programId": "testing-program-5",
        "affiliateId": "={{$node[\"Tapfiliate\"].json[\"id\"]}}",
        "additionalFields": {}
      },
      "credentials": {
        "tapfiliateApi": "Tapfiliate API credentials"
      },
      "typeVersion": 1,
      "id": "65153081-86e0-4873-a535-025bbf44602b",
      "notes": "This tapfiliate node performs automated tasks as part of the workflow."
    },
    {
      "name": "Tapfiliate1",
      "type": "n8n-nodes-base.tapfiliate",
      "position": [
        670,
        300
      ],
      "parameters": {
        "resource": "affiliateMetadata",
        "metadataUi": {
          "metadataValues": [
            {
              "key": "YOUR_CREDENTIAL_HERE",
              "value": "n8n"
            }
          ]
        },
        "affiliateId": "={{$json[\"id\"]}}"
      },
      "credentials": {
        "tapfiliateApi": "Tapfiliate API credentials"
      },
      "typeVersion": 1,
      "id": "2aa3fd76-2d58-4a6b-9e0c-7fd7f5949a4b",
      "notes": "This tapfiliate node performs automated tasks as part of the workflow."
    },
    {
      "name": "Tapfiliate",
      "type": "n8n-nodes-base.tapfiliate",
      "position": [
        470,
        300
      ],
      "parameters": {
        "email": "n8ndocsburner@gmail.com",
        "lastname": "Ryan",
        "firstname": "Jack",
        "additionalFields": {}
      },
      "credentials": {
        "tapfiliateApi": "Tapfiliate API credentials"
      },
      "typeVersion": 1,
      "id": "fdac1923-ce11-4664-82b3-ed1149db021b",
      "notes": "This tapfiliate node performs automated tasks as part of the workflow."
    },
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        300
      ],
      ...

Output:
The node 'Error Handler' 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.


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": "93",
  "name": "Create, update, and get activity in Strava",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        340
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "d71d17f2-3535-49b2-bdc7-710e407563d3",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Strava",
      "type": "n8n-nodes-base.strava",
      "position": [
        470,
        340
      ],
      "parameters": {
        "name": "Morning Run",
        "type": "Run",
        "startDate": "2020-10-01T18:30:00.000Z",
        "elapsedTime": 3600,
        "additionalFields": {
          "distance": 1000
        }
      },
      "typeVersion": 1,
      "id": "8af9bab5-6a5d-4818-af12-85536efc80a6",
      "notes": "This strava node performs automated tasks as part of the workflow."
    },
    {
      "name": "Strava1",
      "type": "n8n-nodes-base.strava",
      "position": [
        670,
        340
      ],
      "parameters": {
        "operation": "update",
        "activityId": "={{$node[\"Strava\"].json[\"id\"]}}",
        "updateFields": {
          "description": "Morning run in the park"
        }
      },
      "credentials": {
        "stravaOAuth2Api": "strava"
      },
      "typeVersion": 1,
      "id": "ffd210ef-8420-4127-b581-5765fca755d3",
      "notes": "This strava node performs automated tasks as part of the workflow."
    },
    {
      "name": "Strava2",
      "type": "n8n-nodes-base.strava",
      "position": [
        870,
        340
      ],
      "parameters": {
        "operation": "get",
        "activityId": "={{$node[\"Strava\"].json[\"id\"]}}"
      },
      "credentials": {
        "stravaOAuth2Api": "strava"
      },
      "typeVersion": 1,
      "id": "b8f2a11f-0ba7-429f-a346-daf29d4fc7c4",
      "notes": "This strava node performs automated tasks as part of the workflow."
    },
    {...

Output:
The node 'Strava' (type: n8n-nodes-base.strava) 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": {
  "stravaOAuth2Api": "strava"
}
```

**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 'Strava' node.


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

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

Workflow JSON:
{
  "id": "95",
  "name": "Create an organization in Affinity",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        400,
        250
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "db96779d-9d0d-4f8c-8038-ab49858c5020",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Affinity",
      "type": "n8n-nodes-base.affinity",
      "position": [
        600,
        250
      ],
      "parameters": {
        "name": "",
        "domain": "",
        "additionalFields": {},
        "_injected_number_field": "not_a_number"
      },
      "credentials": {
        "affinityApi": ""
      },
      "typeVersion": 1,
      "id": "4434a13e-9015-4307-b286-9959e1cdfbbb",
      "notes": "This affinity node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-0581ddfa",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create an organization in Affinity. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-acc35aee",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.774223",
    "updatedAt": "2025-09-29T07:07:49.774242",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "hi...

Output:
The node 'Affinity' 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.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-250d0d23",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.778191",
    "updatedAt": "2025-09-29T07:07:49.778199",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "beebd9ac-4021-4e45-9971-4205c37e3742",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -500,
        40
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "61e48c99-fdd3-4db7-8e2e-67cb2c2dfd97",
      "name": "SIGNL4",
      "type": "n8n-nodes-base.signl4",
      "position": [
        60,
        -140
      ],
      "parameters": {
        "message": "=Weather alert \u2744\ufe0f Temperature: {{ $json.main.temp }} \u00b0C",
        "additionalFields": {
          "title": "Weather Alert from n8n",
          "externalId": "weather-alert",
          "locationFieldsUi": {
            "locationFieldsValues": {
              "latitude": "={{ $json.coord.lat }}",
              "longitude": "={{ $json.coord.lon }}"
            }
          }
        }
      },
      "credentials": {
        "signl4Api": {
          "id": "EAiJUjPUA6kiAnG9",
          "name": "SIGNL4 Webhook account"
        }
      },
      "typeVersion": 1,
      "notes": "This signl4 node performs automated tasks as part of the workflow."
    },
    {
      "id": "739a31e4-d353-4c95-bb84-b36f6a5560cf",
      "name": "OpenWeatherMap",
      "type": "n8n-nodes-base.openWeatherMap",
      "position": [
        -320,
        -140
      ],
      "parameters": {
        "cityName": "Berlin"
      },
      "credentials": {
        "openWeatherMapApi": {
          "id": "oH1seTNeKu1d87wm",
          "name": "OpenWeatherMap account"
        }
      },
  ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "96",
  "name": "Create, update and get a subscriber using the MailerLite node",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        310,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "41352635-a247-432c-8eba-90adc03bc5f9",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "MailerLite",
      "type": "n8n-nodes-base.mailerLite",
      "position": [
        510,
        300
      ],
      "parameters": {
        "email": "harshil@n8n.io",
        "additionalFields": {
          "name": "Harshil"
        }
      },
      "credentials": {
        "mailerLiteApi": "mailerlite"
      },
      "typeVersion": 1,
      "id": "308a1a1a-b9b4-460e-b69b-530ec3ea7233",
      "notes": "This mailerLite node performs automated tasks as part of the workflow."
    },
    {
      "name": "MailerLite1",
      "type": "n8n-nodes-base.mailerLite",
      "position": [
        710,
        300
      ],
      "parameters": {
        "operation": "update",
        "subscriberId": "={{$node[\"MailerLite\"].json[\"email\"]}}",
        "updateFields": {
          "customFieldsUi": {
            "customFieldsValues": [
              {
                "value": "Berlin",
                "fieldId": "city"
              }
            ]
          }
        }
      },
      "credentials": {
        "mailerLiteApi": "mailerlite"
      },
      "typeVersion": 1,
      "id": "c51e9987-6404-4d98-8a63-8636786dc3bc",
      "notes": "This mailerLite node performs automated tasks as part of the workflow."
    },
    {
      "name": "MailerLite2",
      "type": "n8n-nodes-base.mailerLite",
      "position": [
        910,
        300
      ],
      "parameters": {
        "operation": "get",
        "subscriberId": "={{$node[\"MailerLite\"].json[\"email\"]}}"
      },
      "credentials": {
        "mailerLiteApi": "mail...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "96",
  "name": "Create a new contact in Agile CRM",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "144f464d-21a0-478e-bdc3-d18eb257d56a",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "AgileCRM",
      "type": "n8n-nodes-base.agileCrm",
      "position": [
        450,
        300
      ],
      "parameters": {
        "operation": "create",
        "additionalFields": {
          "lastName": "",
          "firstName": ""
        }
      },
      "credentials": {
        "agileCrmApi": ""
      },
      "typeVersion": 1,
      "id": "6930eae5-52c9-463e-8a4c-128ee0e1f0ac",
      "notes": "This agileCrm node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-f3174b59",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create a new contact in Agile CRM. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-3a54aa30",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.778007",
    "updatedAt": "2025-09-29T07:07:49.778020",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high...

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:
{
  "id": "98",
  "name": "Create a new task in Asana",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "c951229d-c2a5-4416-adb2-d4975a342c63",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Asana",
      "type": "n8n-nodes-base.asana",
      "position": [
        450,
        300
      ],
      "parameters": {
        "name": "={{ $node.NonExistentNode.json.data }}",
        "workspace": "",
        "otherProperties": {}
      },
      "credentials": {
        "asanaApi": ""
      },
      "typeVersion": 1,
      "id": "b6c3809a-8c46-487c-acd6-8dd7b93035dc",
      "notes": "This asana node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-20b8850f",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create a new task in Asana. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-70120f7c",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.775204",
    "updatedAt": "2025-09-29T07:07:49.775218",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
 ...

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

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

**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 'Asana' parameter 'name'.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        430,
        310
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "4b3ac151-9df7-4178-92cb-06c4a2c4d583",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Function",
      "type": "n8n-nodes-base.function",
      "position": [
        630,
        310
      ],
      "parameters": {
        "functionCode": "={{ $items[999].json.value }}"
      },
      "typeVersion": 1,
      "id": "911c50a5-4ffc-4ee4-8f92-b2b8fe28045a",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "name": "SplitInBatches",
      "type": "n8n-nodes-base.splitInBatches",
      "position": [
        830,
        310
      ],
      "parameters": {
        "options": {},
        "batchSize": 1
      },
      "typeVersion": 1,
      "id": "9f9ba639-cd72-48cd-b2c8-ae228a590489",
      "notes": "This splitInBatches node performs automated tasks as part of the workflow."
    },
    {
      "name": "If Node",
      "type": "n8n-nodes-base.if",
      "position": [
        1030,
        460
      ],
      "parameters": {
        "conditions": {
          "number": [
            {
              "value1": "={{$node[\"SplitInBatches\"].context[\"currentRunIndex\"];}}",
              "value2": 5,
              "operation": "equal"
            }
          ],
          "boolean": []
        }
      },
      "typeVersion": 1,
      "id": "ac58615e-367e-444c-8833-220e9440719e",
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        1230,
        360
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "Message",
              "value": "Loop Ended"
            }
   ...

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

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

for (let i=0;i<10;i++) {
  newItems.push({json:{i}});
}

return newItems;`

**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 'Function' parameter 'functionCode'.