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": "x2kgOnBLtqAjqUVS",
  "meta": {
    "instanceId": "workflow-d8be2030",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.900123",
    "updatedAt": "2025-09-29T07:07:43.900150",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Automated Work Attendance with Location Triggers",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "b2cba308-6d47-432b-9296-58f233f15565",
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        0,
        0
      ],
      "webhookId": "801c8367-af7b-4371-8684-cc699090b97f",
      "parameters": {
        "path": "time-track",
        "options": {}
      },
      "typeVersion": 2,
      "notes": "This webhook node performs automated tasks as part of the workflow."
    },
    {
      "id": "67354f1c-9dac-4edd-b07d-f1b0dbd80159",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        0,
        -260
      ],
      "parameters": {
        "width": 1120,
        "height": 180,
        "content": "## Check if the Worksheet Exists"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "5fc5a1a6-f18d-4ee0-a70b-30de48a45dc7",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        220,
        -220
      ],
      "parameters": {
        "filter": {},
        "options": {},
        "resource": "fileFolder",
        "returnAll": true,
        "queryString": "WorkTimeTracking"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "U6W5tWhDvO7rQ73t",
          "name": "Google Drive account"
        }
      },
      "executeOnce": false,
      "typeVersion": 3,
      "alwaysOutputData"...

Output:
The node 'Create Worksheet' 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 'Create Worksheet'.


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": "xLjE4IkQXARXOCZy",
  "meta": {
    "instanceId": "workflow-d179757a",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.926858",
    "updatedAt": "2025-09-29T07:07:43.926868",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Import multiple Manufacturers from Google Sheets to Shopware 6",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "460ed5fb-cc70-41ed-b6e2-07bc2266603f",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        340,
        360
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "291e6fc4-31b4-4c7c-91e8-261581664759",
      "name": "Settings",
      "type": "n8n-nodes-base.set",
      "position": [
        620,
        360
      ],
      "parameters": {
        "fields": {
          "values": [
            {
              "name": "shopware_url",
              "stringValue": "{{ $env.WEBHOOK_URL }}"
            },
            {
              "name": "default_language_code",
              "stringValue": "de_DE"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 3.2,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "38f62300-bbc9-4c2e-a1ba-1d1a49e9cecc",
      "name": "Create Import Request Body",
      "type": "n8n-nodes-base.code",
      "position": [
        1260,
        360
      ],
      "parameters": {
        "jsCode": "// importing crypto package to create md5 hashes for the media ids\nconst crypto = require('crypto');\nconst md5 = data => crypto.createHash('md5').update(data).digest(\"hex\")\n\nfunction addTranslation(translation...

Output:
In node 'Import Manufacturer', the parameter 'authentication' contains an expression that references undefined data.

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

**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 'Import Manufacturer' parameter 'authentication'.


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": "xlMrGt0c1eFi4J1U",
  "meta": {
    "instanceId": "workflow-1ffb04e0",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.934827",
    "updatedAt": "2025-09-29T07:07:43.934859",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Addon for Workflow Nodes Update Check Template",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "e8068a93-5474-474e-a48e-947269b7ca5f",
      "name": "Execute Workflow Trigger",
      "type": "n8n-nodes-base.executeWorkflowTrigger",
      "position": [
        860,
        1140
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This executeWorkflowTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "9b4524d8-6ded-489b-bf45-6810f5306652",
      "name": "Sticky Note4",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        800,
        120
      ],
      "parameters": {
        "color": 5,
        "width": 1316.8621045610755,
        "height": 887.980239951363,
        "content": "## Download the main workflow and connect it's output to this workflow\n- Download this workflow and follow the belonging instructions: [{{ $env.WEBHOOK_URL }}]({{ $env.WEBHOOK_URL }}\n- Add an \"Execute Workflow\" node and configure it, so it calls this workflow.\n  \n![Image]({{ $env.WEBHOOK_URL }}"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "cb0cacc1-34d0-4e4d-a7db-e44ece1a155f",
      "name": "Prepare Output",
      "type": "n8n-nodes-base.set",
      "position": [
        2180,
        1140
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "26c2bf59-2051-47e3-a6bf-3896ad4...

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: 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": "yPIST7l13huQEjY5",
  "meta": {
    "instanceId": "workflow-83e69afb",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.937110",
    "updatedAt": "2025-09-29T07:07:43.937116",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Use XMLRPC via HttpRequest-node to post on Wordpress.com",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "8a64ffca-804a-4793-a721-3cb670aec22f",
      "name": "Settings",
      "type": "n8n-nodes-base.set",
      "position": [
        -380,
        -700
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "1be018c7-51fe-4ea2-967d-ce47a2e8795c",
              "name": "wordpressUrl",
              "type": "string",
              "value": "YOURBLOG.wordpress.com"
            },
            {
              "id": "95377f4f-184b-46a7-94c7-b2313c314cb2",
              "name": "wordpressUsername",
              "type": "string",
              "value": "YourUserName"
            },
            {
              "id": "fdc99dc6-d9b0-4d2f-b770-1d8b6b360cad",
              "name": "wordpressApplicationPassword",
              "type": "string",
              "value": "your 4app pass word"
            },
            {
              "id": "5aee5eef-9ad2-4dfb-a63f-1b5228c47e31",
              "name": "contentTitle",
              "type": "string",
              "value": "This is a demo title"
            },
            {
              "id": "2abf516c-2910-4cd0-89fe-119cd0e616c8",
              "name": "contentText",
              "type": "string",
              "value": "This is the main text."
            }
          ]
        }
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
 ...

Output:
The node 'IsSuccessful' 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 'IsSuccessful'.


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": "zMtPPjJ80JJznrJP",
  "meta": {
    "instanceId": "workflow-d056b093",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.936784",
    "updatedAt": "2025-09-29T07:07:43.936799",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "AI-Powered WhatsApp Chatbot for Text, Voice, Images & PDFs",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "38246f5d-0cf4-49ed-957e-0189243d0dec",
      "name": "WhatsApp Trigger",
      "type": "n8n-nodes-base.whatsAppTrigger",
      "position": [
        -700,
        80
      ],
      "webhookId": "d3978cae-2aca-4553-8ac7-ab89068deabc",
      "parameters": {
        "options": {},
        "updates": [
          "messages"
        ]
      },
      "credentials": {
        "whatsAppTriggerApi": {
          "id": "gylriO2te7NRPXxN",
          "name": "WhatsApp OAuth account"
        }
      },
      "typeVersion": 1,
      "notes": "This whatsAppTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "4cc0b70b-3ecc-4415-af2f-e50d4f302786",
      "name": "Download Image",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        720,
        120
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "authentication": "{{ $credentials.genericCredentialType }}",
        "genericAuthType": "httpHeaderAuth"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "FDP9FxauzJt9rkjr",
          "name": "WhatsApp"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "528984be-b9ad-41c7-8b2e-ccbf275f7805",
      "name": "Analyze Image",
      "type": "n8n-nodes-base.noOp",
      "position": [
        960,
   ...

Output:
The node 'OpenAI Chat Model' has a data type mismatch in its parameters.

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'OpenAI Chat Model'.


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

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

Workflow JSON:
{
  "id": "zeyTmqqmXaQIFWzV",
  "meta": {
    "instanceId": "workflow-41ee02ce",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.959046",
    "updatedAt": "2025-09-29T07:07:43.959060",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "OIDC client workflow",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "da0c6b83-9c8c-431b-beaa-66b5343b21c5",
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        80,
        680
      ],
      "webhookId": "891ad1cd-6a50-4a88-8789-95680c78f14c",
      "parameters": {
        "path": "891ad1cd-6a50-4a88-8789-95680c78f14c",
        "options": {},
        "responseMode": "responseNode"
      },
      "typeVersion": 1,
      "notes": "This webhook node performs automated tasks as part of the workflow."
    },
    {
      "id": "5c9d4f59-7980-4bee-8df6-cf9ca3eccde1",
      "name": "Code",
      "type": "n8n-nodes-base.code",
      "position": [
        520,
        680
      ],
      "parameters": {
        "jsCode": "let myCookies = {};\nlet cookies = [];\n\ncookies = $input.item.json.headers.cookie.split(';')\nfor (item of cookies ) {\n  myCookies[item.split('=')[0].trim()]=item.split('=')[1].trim();\n}\n\nreturn myCookies;"
      },
      "typeVersion": 2,
      "continueOnFail": true,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "7867d061-c0e3-4359-90ac-a4536c948db2",
      "name": "user info",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1220,
        760
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Authorization",
     ...

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

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

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

**Solutions**:

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

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

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

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

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

Add rate limiting protection with Wait nodes and retry logic.


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

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

Workflow JSON:
{
  "id": "14"
  "name": "Update Crypto Values",
  "nodes": [
    {
      "name": "CoinGecko",
      "type": "n8n-nodes-base.coinGecko",
      "position": [
        670,
        400
      ],
      "parameters": {
        "coinId": "={{$json[\"fields\"][\"Symbol\"]}}",
        "options": {
          "market_data": true,
          "localization": false
        },
        "operation": "get"
      },
      "typeVersion": 1,
      "id": "087c7878-600e-4054-ad3d-9b7e2101896b",
      "notes": "This coinGecko node performs automated tasks as part of the workflow."
    },
    {
      "name": "Get Portfolio",
      "type": "n8n-nodes-base.airtable",
      "position": [
        450,
        400
      ],
      "parameters": {
        "table": "Portfolio",
        "operation": "list",
        "application": "appT7eX4iZcZVRIdq",
        "additionalOptions": {
          "fields": [
            "Symbol"
          ]
        }
      },
      "credentials": {
        "airtableApi": "Airtable"
      },
      "typeVersion": 1,
      "id": "195b1331-3cb6-4c20-bd59-b18f7da8245c",
      "notes": "This airtable node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        870,
        400
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "Present Price",
              "value": "={{$json[\"market_data\"][\"current_price\"][\"usd\"]}}"
            },
            {
              "name": "Id",
              "value": "={{$node[\"Get Portfolio\"].json[\"id\"]}}"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1,
      "id": "2705b23f-911d-432b-a152-c59d4dc40fd7",
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "name": "Run Top of Hour",
      "type": "n8n-nodes-base.cron",
      "position": [
        240,
        400
      ],
  ...

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: 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-20b9bf8d",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.967781",
    "updatedAt": "2025-09-29T07:07:43.967800",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "ab8e653f-a60c-497c-b732-6dea355aa985",
      "name": "Compare the two Datasets",
      "type": "n8n-nodes-base.compareDatasets",
      "position": [
        900,
        160
      ],
      "parameters": {
        "options": {},
        "mergeByFields": {
          "values": [
            {
              "field1": "Playlist avant ajout",
              "field2": "Nouvelle pistes"
            }
          ]
        }
      },
      "typeVersion": 2.3,
      "notes": "This compareDatasets node performs automated tasks as part of the workflow."
    },
    {
      "id": "606aa397-efd6-4f6b-bfa6-946523ed80f2",
      "name": "Extract the spotify track ID",
      "type": "n8n-nodes-base.set",
      "position": [
        580,
        80
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "dd3db6c8-ecf5-4595-ac4b-559965b6e507",
              "name": "Playlist avant ajout",
              "type": "string",
              "value": "={{ $json.track.id }}"
            }
          ]
        }
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "75e48bf0-5003-4904-b8c7-0cca005bacd7",
      "name": "Extract the Spotify Track ID",
      "type": "n8n-nodes-base.set",
      "position": [
        580,
        260
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "a9593caf-e403-4626-a96f-499e9f78465e",
              "name": "Nouvelle pistes",
              "type": "stri...

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": "28",
  "name": "Receive updates when a subscriber is added through a form in ConvertKit",
  "nodes": [
    {
      "name": "ConvertKit Trigger",
      "type": "n8n-nodes-base.convertKitTrigger",
      "position": [
        690,
        260
      ],
      "webhookId": "55336480-7be1-4432-8fc8-d860572c1c18",
      "parameters": {
        "event": "formSubscribe",
        "formId": 1657198
      },
      "credentials": {
        "convertKitApi": "convertkit"
      },
      "typeVersion": 1,
      "id": "137b7728-7ea8-4709-8c32-8fe1ba22c100",
      "notes": "This convertKitTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-5a488409",
      "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: Receive updates when a subscriber is added through a form in ConvertKit. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-219aaf48",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.017604",
    "updatedAt": "2025-09-29T07:07:44.017638",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "notes": "Excellent quality workflow: Receive updates when a subscriber is added throu...

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:
{
  "meta": {
    "instanceId": "workflow-65ab4ffe"
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:43.994965",
    "updatedAt": "2025-09-29T07:07:43.994978",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "9b5b5af9-8a56-40a3-ad75-1e1186e96439",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        640,
        360
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "7c99e8d9-ef79-4833-bb0c-5005d210418e",
      "name": "n8n | Get all executions",
      "type": "n8n-nodes-base.n8n",
      "position": [
        880,
        360
      ],
      "parameters": {
        "filters": {},
        "options": {},
        "resource": "execution",
        "returnAll": true
      },
      "credentials": {
        "n8nApi": {
          "id": "3c3kWsiMeyTemNnV",
          "name": "n8n account"
        }
      },
      "typeVersion": 1,
      "notes": "This n8n node performs automated tasks as part of the workflow."
    },
    {
      "id": "95ae4ed4-22d4-41dc-be75-ea1224985f80",
      "name": "Convert to CSV",
      "type": "n8n-nodes-base.convertToFile",
      "position": [
        1140,
        360
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.1,
      "notes": "This convertToFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "07665975-a07c-4c7c-b9ec-cad583b17c07",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        800,
        220
      ],
      "parameters": {
        "color": 5,
        "width": 254,
        "height": 355,
        "content": "## Get all executions\n**Workflow and Status Filters can be appli...

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: Expression Reference Error

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-7bd9ab9d",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.025364",
    "updatedAt": "2025-09-29T07:07:44.025375",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "68c2216d-7393-4d64-a6e4-7b5e384389a4",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        420,
        1020
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4.1-mini",
          "cachedResultName": "gpt-4.1-mini"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "DVUm005uVd1yUYSL",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.2,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "849df02a-cd4c-4c1a-80c9-84852eccd7d7",
      "name": "Merge",
      "type": "n8n-nodes-base.merge",
      "position": [
        840,
        500
      ],
      "parameters": {
        "mode": "combine",
        "options": {},
        "combineBy": "combineByPosition"
      },
      "typeVersion": 3.1,
      "notes": "This merge node performs automated tasks as part of the workflow."
    },
    {
      "id": "b1fe6bd4-f20b-4e13-83ce-58aa80372fe5",
      "name": "Read Image URLs",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        -300,
        480
      ],
      "parameters": {
        "options": {},
        "sheetName": {
          "__rl": true,
          "mode": "list",
          "value": "gid=0",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "Product Images"
        },
        "documentId": {
          "__rl": true,
          "mode": "list",
          "value": "17zQUytFekDK305wvgxYdEYm4N5QEQ1mrwsfccNn...

Output:
In node 'Product Photography Prompt', the parameter 'promptType' contains an expression that references undefined data.

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

**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 'Product Photography Prompt' parameter 'promptType'.


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": "tnRYt0kDGMO9BBFd",
  "meta": {
    "instanceId": "workflow-43dbc0ad",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.032404",
    "updatedAt": "2025-09-29T07:07:44.032457",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "n8n Graphic Design Team",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "c1c292f8-78a4-407b-be6b-567e94271bc6",
      "name": "Google Sheets",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1900,
        -60
      ],
      "parameters": {
        "columns": {
          "value": {
            "Link": "={{ $json.webContentLink }}",
            "nsfw": "={{ $('SetImageData').item.json.image.nsfw }}",
            "seed": "={{ $('SetImageData').item.json.image.seed }}",
            "type": "={{ $('GET image').item.binary.data.fileExtension || \"png\" }}",
            "image": "={{ $json.webViewLink }}",
            "width": "={{ $('Ideogram Image generator').item.json.data[0].resolution.split(\"x\",1)[0] }}",
            "height": "={{ $('Ideogram Image generator').item.json.data[0].resolution.split(\"x\",2)[1] }}",
            "prompt": "={{ $('SetImageData').item.json.image.prompt }}",
            "GenModel": "={{ $('SetImageData').item.json.imageGen.model || \"None\" }}",
            "GenPrompt": "={{ $('Ideogram Image generator').item.json.data[0].prompt || \"None\" }}",
            "created_at": "={{ $('Ideogram Image generator').item.json.created }}",
            "drive_link": "={{ $json.webViewLink }}",
            "GenStyleType": "={{ $('SetImageData').item.json.imageGen['style-type'] || \"None\" }}",
            "GenAspectRatio": "={{ $('SetImageData').item.json.imageGen['aspect-ratio'] || \"None\" }}",
            "GenNegativePrompt": "={{ $('SetImageData').item.json.imageGen['negat...

Output:
The node 'OpenAI Chat Model1' has a data type mismatch in its parameters.

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'OpenAI Chat Model1'.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "Copper Trigger",
      "type": "n8n-nodes-base.copperTrigger",
      "position": [
        890,
        400
      ],
      "webhookId": "493ce79a-6a08-4062-86d9-7f4618b6c1ea",
      "parameters": {
        "event": "new",
        "resource": "project"
      },
      "credentials": {
        "copperApi": "copper_creds"
      },
      "typeVersion": 1,
      "id": "3fe122e5-9f5c-4d78-ba90-bd6e30606fa3",
      "notes": "This copperTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-16bfa15f",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "connections": {},
  "name": "Coppertrigger Workflow",
  "description": "Automated workflow: Coppertrigger 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": "workflow-0f3256ad",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.063444",
    "updatedAt": "2025-09-29T07:07:44.063451",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "notes": "Excellent quality workflow: Coppertrigger Workflow. This workflow has been optimized for production use with comprehensive error handling, security, and documentation."
}...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": 4,
  "name": "Email",
  "nodes": [
    {
      "id": "trigger-858025f9",
      "name": "Manual Trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        100,
        100
      ],
      "parameters": {}
    },
    {
      "name": "IMAP Email",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        -300,
        200
      ],
      "parameters": {
        "format": "resolved",
        "options": {}
      },
      "credentials": {
        "imap": {
          "id": "{{ $credentials.imap.id }}",
          "name": "IMAP account"
        }
      },
      "typeVersion": 1,
      "id": "a1b8f208-fd19-4b4e-b3b1-840b77c28440",
      "notes": "This emailReadImap node performs automated tasks as part of the workflow."
    },
    {
      "name": "TheHive",
      "type": "n8n-nodes-base.theHive",
      "position": [
        -20,
        200
      ],
      "parameters": {
        "tags": "Email",
        "type": "Email",
        "title": "={{$node[\"IMAP Email\"].binary.attachment_0.fileName}}",
        "source": "Outlook",
        "sourceRef": "={{$node[\"IMAP Email\"].json[\"messageId\"]}}",
        "artifactUi": {
          "artifactValues": [
            {
              "dataType": "file",
              "binaryProperty": "attachment_0"
            }
          ]
        },
        "description": "={{$node[\"IMAP Email\"].binary.attachment_0.fileName}}",
        "additionalFields": {}
      },
      "credentials": {
        "theHiveApi": {
          "id": "{{ $credentials.theHiveApi.id }}",
          "name": "The Hive account"
        }
      },
      "typeVersion": 1,
      "alwaysOutputData": true,
      "id": "43335984-0ba1-42ad-846b-074e81149726",
      "notes": "This theHive node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create Case",
      "type": "n8n-nodes-base.theHive",
      "position": [
        280,
        200
      ],
      "parameters": {
        "id":...

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: Empty Input Handling

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "trigger-ae8b249e",
      "name": "Manual Trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        100,
        100
      ],
      "parameters": {}
    },
    {
      "name": "Mock Data",
      "type": "n8n-nodes-base.function",
      "position": [
        670,
        371
      ],
      "parameters": {
        "functionCode": "return [\n  {\n    json:[\n      {\n        id: 1,\n        name: \"Jim\"\n      }, \n      {\n        id: 2,\n        name: \"Stefan\"\n      },\n      {\n        id: 3,\n        name: \"Hans\"\n      }\n    ]\n  }\n];"
      },
      "typeVersion": 1,
      "id": "bd24b966-3ccc-40a2-8610-27200b5ce169",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create JSON-items",
      "type": "n8n-nodes-base.function",
      "position": [
        910,
        371
      ],
      "parameters": {
        "functionCode": "return items[0].json.map(item => { \n  return {\n    json: item,\n  }\n})\n"
      },
      "typeVersion": 1,
      "id": "8030781e-2e57-40f8-acfe-4c1ac4608504",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-e8eed1aa",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "connections": {},
  "name": "Function Workflow",
  "description": "Automated workflow: Function 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,
 ...

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:
{
  "nodes": [
    {
      "id": "trigger-cefc0353",
      "name": "Manual Trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        100,
        100
      ],
      "parameters": {}
    },
    {
      "name": "Mock Data",
      "type": "n8n-nodes-base.function",
      "position": [
        802,
        307
      ],
      "parameters": {
        "functionCode": "return [\n  {\n    json: {\n      id: 1,\n      name: \"Jim\"\n    }\n  },\n  {\n    json: {\n      id: 2,\n      name: \"Stefan\"\n    }\n  },\n  {\n    json: {\n      id: 3,\n      name: \"Hans\"\n    }\n  }\n];"
      },
      "typeVersion": 1,
      "id": "3ec6ffbb-bb0b-49c4-be24-94c8a27958a8",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create an array of objects",
      "type": "n8n-nodes-base.function",
      "position": [
        1052,
        307
      ],
      "parameters": {
        "functionCode": "={{ $json.deeply.nested.undefined.path }}"
      },
      "typeVersion": 1,
      "id": "d7836f05-e6b9-4920-bcb0-17da5b39b89c",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-e8d1962d",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "connections": {},
  "name": "Function Workflow",
  "description": "Automated workflow: Function 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
  },
  "...

Output:
In node 'Create an array of objects', the parameter 'functionCode' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json.deeply.nested.undefined.path }}`
**Original Value**: `return [
  {
    json: {
      data_object: items.map(item => item.json),
    },
  }
];
`

**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 'Create an array of objects' parameter 'functionCode'.


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": "33",
  "name": "Postgres Data Ingestion",
  "nodes": [
    {
      "name": "Cron",
      "type": "n8n-nodes-base.cron",
      "position": [
        300,
        250
      ],
      "parameters": {
        "triggerTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "f0878547-0770-40bb-93f7-7103db272b8a",
      "notes": "This cron node performs automated tasks as part of the workflow."
    },
    {
      "name": "Function",
      "type": "n8n-nodes-base.function",
      "position": [
        500,
        250
      ],
      "parameters": {
        "functionCode": "var today = new Date();\nvar date = today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate();\nvar time = today.getHours() + \":\" + today.getMinutes() + \":\" + today.getSeconds();\nvar dateTime = date+' '+time;\n\nitems[0].json.sensor_id = 'humidity01';\nitems[0].json.value = Math.ceil(Math.random()*100);\nitems[0].json.time_stamp = dateTime;\nitems[0].json.notification = false;\n\nreturn items;"
      },
      "typeVersion": 1,
      "id": "4569f9cc-9932-433c-81f1-df9204d38b6c",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "name": "Postgres",
      "type": "n8n-nodes-base.postgres",
      "position": [
        680,
        250
      ],
      "parameters": {
        "table": "n8n",
        "columns": "sensor_id,value,time_stamp,notification"
      },
      "typeVersion": 1,
      "id": "a6bc69b8-f7c9-400a-b54b-ef5bc2d24170",
      "notes": "This postgres node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-90c1b85a",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": ...

Output:
The node 'Postgres' (type: n8n-nodes-base.postgres) 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": {
  "postgres": "Postgres"
}
```

**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 'Postgres' node.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        350,
        70
      ],
      "webhookId": "727b4887-e7f9-405f-bf94-7889c82a8f0b",
      "parameters": {
        "path": "sh",
        "options": {},
        "responseMode": "lastNode"
      },
      "typeVersion": 1,
      "id": "node-18717d2e"
    },
    {
      "name": "Extract URL",
      "type": "n8n-nodes-base.set",
      "position": [
        650,
        -80
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "url",
              "value": "={{$node[\"Webhook\"].json[\"query\"][\"url\"]}}"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1,
      "id": "node-10d1922e"
    },
    {
      "name": "Check URL",
      "type": "n8n-nodes-base.if",
      "position": [
        500,
        70
      ],
      "parameters": {
        "conditions": {
          "boolean": [
            {
              "value1": "={{Object($node[\"Webhook\"].json[\"query\"]).hasOwnProperty(\"url\")}}",
              "value2": true
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "node-f5cf8f6e"
    },
    {
      "name": "Crypto",
      "type": "n8n-nodes-base.crypto",
      "position": [
        800,
        -80
      ],
      "parameters": {
        "type": "SHA256",
        "value": "={{$node[\"Extract URL\"].json[\"url\"]}}"
      },
      "typeVersion": 1,
      "id": "node-ce570b2e"
    },
    {
      "name": "Airtable",
      "type": "n8n-nodes-base.airtable",
      "position": [
        1550,
        -30
      ],
      "parameters": {
        "table": "YOUR TABLE NAME",
        "options": {},
        "operation": "append",
        "application": "YOUR BASE ID"
      },
      "credentials": {
        "airtableApi": "Personal Airtable API creds"
      },
      "typeVersion": 1,
      "id": "node-1882d7e6"
    },
   ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        460,
        300
      ],
      "webhookId": "0db0a40c-e5d1-463f-8252-03599f1303e6",
      "parameters": {
        "path": "0db0a40c-e5d1-463f-8252-03599f1303e6",
        "options": {},
        "responseMode": "lastNode"
      },
      "typeVersion": 1,
      "id": "node-b6e33f0d"
    },
    {
      "name": "Crypto",
      "type": "n8n-nodes-base.crypto",
      "position": [
        660,
        300
      ],
      "parameters": {
        "type": "SHA256",
        "value": "={{$json[\"query\"][\"crc_token\"]}}",
        "action": "hmac",
        "secret": "{{ $env.SECRET_KEY }}",
        "encoding": "base64"
      },
      "typeVersion": 1,
      "id": "node-2a333d2f"
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        840,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "response_token",
              "value": "=sha256={{$json[\"data\"]}}"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1,
      "id": "node-1dc1b886"
    },
    {
      "id": "error-5c6188b5",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    },
    {
      "parameters": {
        "url": "https://api.example.com/data",
        "method": "GET",
        "options": {}
      },
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        450,
        300
      ]
    }
  ],
  "connections": {},
  "name": "Production Workflow",
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkf...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "29",
  "name": "Receive updates when a subscriber unsubscribes in Customer.io",
  "nodes": [
    {
      "name": "Customer.io Trigger",
      "type": "n8n-nodes-base.customerIoTrigger",
      "position": [
        650,
        260
      ],
      "webhookId": "88092579-1b8d-4d44-98d5-f24b3579cbc2",
      "parameters": {
        "events": [
          "customer.unsubscribed"
        ]
      },
      "credentials": {
        "customerIoApi": "customerIO"
      },
      "typeVersion": 1,
      "id": "b3488ce5-7664-4b32-8a1a-44a3c2f25c69",
      "notes": "This customerIoTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-dda25192",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    },
    {
      "parameters": {
        "url": "https://api.example.com/data",
        "method": "GET",
        "options": {}
      },
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        450,
        300
      ]
    }
  ],
  "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: Receive updates when a subscriber unsubscribes in Customer.io. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-8e09f96f",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.062992",
    "updatedAt": "2025-09-29T07:07:44.063004",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
  ...

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

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

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

**Solutions**:

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

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

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

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

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "Cron"
      "type": "n8n-nodes-base.cron",
      "position": [
        -700,
        1500
      ],
      "parameters": {
        "triggerTimes": {
          "item": [
            {
              "hour": 10,
              "mode": "everyWeek"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "51996f0b-e1b9-45f2-9c32-11a59f8f066e",
      "notes": "This cron node performs automated tasks as part of the workflow."
    },
    {
      "name": "Shopify",
      "type": "n8n-nodes-base.shopify",
      "position": [
        -500,
        1500
      ],
      "parameters": {
        "options": {},
        "operation": "getAll"
      },
      "credentials": {
        "shopifyApi": "shopify_nodeqa"
      },
      "typeVersion": 1,
      "id": "7eba0ae7-b168-4013-b026-3a7b119c3fb5",
      "notes": "This shopify node performs automated tasks as part of the workflow."
    },
    {
      "name": "Function",
      "type": "n8n-nodes-base.function",
      "position": [
        300,
        1400
      ],
      "parameters": {
        "functionCode": "let totalOrders = items.length;\nlet ordersSum = 0;\n\nfor(let i=0; i < items.length; i++) {\n  ordersSum = ordersSum + parseFloat(items[i].json.orderPrice);\n}\nreturn [{json:{totalOrders, ordersSum}}]"
      },
      "typeVersion": 1,
      "id": "920fc6c3-7af3-4791-be9d-3a1800ad03cd",
      "notes": "This function node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Sheets",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        500,
        1500
      ],
      "parameters": {
        "options": {},
        "sheetId": "1GVyV1yYwWZu510NTzVgi2RyesrsnuP3RxXmWbX1O7DQ",
        "operation": "append",
        "authentication": "{{ $credentials.oAuth2 }}"
      },
      "credentials": {
        "googleSheetsOAuth2Api": "google_sheets_oauth"
      },
      "typeVersion": 1,
      "id": "b93586cb-2cfa-47fe-b920-2a92652aa83d",
...

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: 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": [
        240,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "node-2d7a18d1"
    },
    {
      "name": "Item Lists",
      "type": "n8n-nodes-base.itemLists",
      "position": [
        1120,
        300
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "post"
      },
      "typeVersion": 1,
      "id": "node-3875c410"
    },
    {
      "name": "Extract Posts",
      "type": "n8n-nodes-base.htmlExtract",
      "position": [
        900,
        300
      ],
      "parameters": {
        "options": {},
        "extractionValues": {
          "values": [
            {
              "key": "post",
              "cssSelector": ".blog-listing__post-content",
              "returnArray": true,
              "returnValue": "html"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "node-2922afd2"
    },
    {
      "name": "Fetch Website",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        680,
        300
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {
          "timeout": 10000
        },
        "responseFormat": "string"
      },
      "typeVersion": 1,
      "id": "node-4216d589"
    },
    {
      "name": "Set URL",
      "type": "n8n-nodes-base.set",
      "position": [
        460,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "base_domain",
              "value": "https://baserow.io"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1,
      "id": "node-09ea9737"
    },
    {
      "name": "Complete Link",
      "type": "n8n-nodes-base.set",
      "position": [
        240,
        500
      ],
      "parameters": {
        "values": {
          "string": [
            {
 ...

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: Missing Credentials

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-da8e9884",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.101595",
    "updatedAt": "2025-09-29T07:07:44.101610",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "6f869392-1501-49b9-be86-4b767f7ec597",
      "name": "Previous Month",
      "type": "n8n-nodes-base.dateTime",
      "position": [
        360,
        420
      ],
      "parameters": {
        "value": "={{Date()}}",
        "action": "calculate",
        "options": {},
        "duration": 1,
        "timeUnit": "months",
        "operation": "subtract"
      },
      "typeVersion": 1,
      "notes": "This dateTime node performs automated tasks as part of the workflow."
    },
    {
      "id": "1446eb44-bd1e-4dad-9ecc-c2a1e8cb2ca6",
      "name": "1st of Every month at 8am",
      "type": "n8n-nodes-base.cron",
      "position": [
        180,
        420
      ],
      "parameters": {
        "triggerTimes": {
          "item": [
            {
              "hour": 8,
              "mode": "everyMonth"
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This cron node performs automated tasks as part of the workflow."
    },
    {
      "id": "a044ac76-49d9-4046-b008-2b4adf6512b1",
      "name": "Check Summary for Illness or Holiday",
      "type": "n8n-nodes-base.switch",
      "position": [
        760,
        420
      ],
      "parameters": {
        "rules": {
          "rules": [
            {
              "value2": "Holiday",
              "operation": "contains"
            },
            {
              "output": 1,
              "value2": "Illness",
              "operation": "contains"
            }
          ]
        },
        "value1": "={{$json[\"summary\"]}}",
        "dataType": "string"
      },
      "typeVersion": 1,
      "notes": "This switch n...

Output:
The node 'Send email to payroll' (type: n8n-nodes-base.emailSend) 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": {
  "smtp": {
    "id": "{{ $credentials.smtp.id }}",
    "name": "mailtrap"
  }
}
```

**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 'Send email to payroll' node.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-2965a094",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.086479",
    "updatedAt": "2025-09-29T07:07:44.086494",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "0bacf032-53d6-4ba6-ab71-e01625c49cc4",
      "name": "On schedule",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        -1960,
        160
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "minutes",
              "minutesInterval": 1
            }
          ]
        }
      },
      "typeVersion": 1.1,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "2e0d9aef-0a60-4506-9c11-c6c2cccb16ea",
      "name": "Derive last request time",
      "type": "n8n-nodes-base.dateTime",
      "position": [
        -1740,
        160
      ],
      "parameters": {
        "duration": 1,
        "timeUnit": "minutes",
        "magnitude": "={{ $json.timestamp }}",
        "operation": "subtractFromDate",
        "outputFieldName": "last_request_time"
      },
      "typeVersion": 2,
      "notes": "This dateTime node performs automated tasks as part of the workflow."
    },
    {
      "id": "f726c448-b4c4-4159-8ca5-c94c092127b7",
      "name": "Get emails from label and last request time",
      "type": "n8n-nodes-base.gmail",
      "position": [
        -1520,
        160
      ],
      "parameters": {
        "filters": {
          "labelIds": [
            "Label_9178764513576607415"
          ]
        },
        "operation": "getAll",
        "returnAll": true
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "{{ $credentials.gmailOAuth2.id }}",
          "name": "REPLACE ME"
        }
      },
      "typeVersion": 2,
      "notes": "This gmai...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-deb68354",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.094873",
    "updatedAt": "2025-09-29T07:07:44.094886",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "e3df7c90-fd1e-4e56-b4b8-ee2095720077",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        380,
        240
      ],
      "parameters": {
        "rule": {
          "interval": [
            {}
          ]
        }
      },
      "typeVersion": 1.1,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "fd37f3cc-b42c-43db-ba4c-8f760d620050",
      "name": "PURGE DAYS",
      "type": "n8n-nodes-base.dateTime",
      "position": [
        920,
        460
      ],
      "parameters": {
        "options": {},
        "duration": 30,
        "magnitude": "={{ $now }}",
        "operation": "subtractFromDate"
      },
      "typeVersion": 2,
      "notes": "This dateTime node performs automated tasks as part of the workflow."
    },
    {
      "id": "88d38a16-3dad-466f-adab-5c5ac846a65e",
      "name": "DELETE OLD BACKUPS",
      "type": "n8n-nodes-base.dropbox",
      "position": [
        1520,
        460
      ],
      "parameters": {
        "path": "={{ $json.pathDisplay }}",
        "operation": "delete",
        "authentication": "{{ $credentials.oAuth2 }}"
      },
      "credentials": {
        "dropboxOAuth2Api": {
          "id": "{{ $credentials.dropboxOAuth2Api.id }}",
          "name": "Dropbox account"
        }
      },
      "typeVersion": 1,
      "notes": "This dropbox node performs automated tasks as part of the workflow."
    },
    {
      "id": "ff2b37de-8bc8-446a-8369-9bc52a54addd",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "po...

Output:
The node 'Sticky Note2' has a data type mismatch in its parameters.

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'Sticky Note2'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": [
    {
      "id": "a39274d0-6709-4e66-95a7-8c0fc4c0e8b1:
      "name": "if after unsnooze date",
      "type": "n8n-nodes-base.if",
      "position": [
        1840,
        500
      ],
      "parameters": {
        "conditions": {
          "dateTime": [
            {
              "value1": "={{ DateTime.now() }}",
              "value2": "={{ $json.unsnoozeDate }}"
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "id": "a4e2d915-4714-41ea-8995-76b7198df675",
      "name": "at 5am",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        780,
        500
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "triggerAtHour": 5
            }
          ]
        }
      },
      "typeVersion": 1.1,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "7ad8e2f6-0499-4537-8325-9dffc2d7ea3c",
      "name": "every 5 min",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        780,
        280
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "minutes"
            }
          ]
        }
      },
      "typeVersion": 1.1,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "370f380a-923b-4e4f-b025-9e7723662083",
      "name": "Get snoozed tasks",
      "type": "n8n-nodes-base.todoist",
      "position": [
        980,
        500
      ],
      "parameters": {
        "filters": {
          "projectId": "2325216129"
        },
        "operation": "getAll",
        "returnAll": true
      },
      "credentials": {
        "todoistApi": {
          "id": "{{ $credentials.todoistApi.id }}",
          "name": "Todoist account"
        }
      },
      "retryOnFail": tr...

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

Add the missing closing quote to complete the string.


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

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

Workflow JSON:
{
  "meta" {
    "instanceId": "workflow-cf288bc4",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.108388",
    "updatedAt": "2025-09-29T07:07:44.108406",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "93963e3d-bd30-4a0f-ba56-7896cd19d2ae",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -660,
        160
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "c459e403-01b8-43dd-8065-1f8dcb77bcc0",
      "name": "Run Every 5 Minutes",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        -660,
        -40
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "minutes"
            }
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "7cabd06a-7898-4789-9671-78f0b6fcac2a",
      "name": "Get 5 Minute Ago Timestamp",
      "type": "n8n-nodes-base.dateTime",
      "position": [
        -320,
        40
      ],
      "parameters": {
        "options": {},
        "duration": 5,
        "timeUnit": "minutes",
        "magnitude": "={{ $now.toUTC() }}",
        "operation": "subtractFromDate",
        "outputFieldName": "queryDate"
      },
      "typeVersion": 2,
      "notes": "This dateTime node performs automated tasks as part of the workflow."
    },
    {
      "id": "5f21f279-3608-41bf-8986-47832aa0f1f2",
      "name": "Get Incidents from ServiceNow",
      "type": "n8n-nodes-base.serviceNow",
      "onError": "continueErrorOutput",
      "position": [
        -100,
        40
      ],
      "parameters": {
 ...

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: 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": 65,
  "meta": {
    "instanceId": "workflow-9a29dd96",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.112807",
    "updatedAt": "2025-09-29T07:07:44.112816",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Two Way Sync Pipedrive and MySQL",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "7355c5ac-a9a6-4fa5-8036-71fd09e95cd4",
      "name": "Compare Datasets",
      "type": "n8n-nodes-base.compareDatasets",
      "position": [
        1220,
        480
      ],
      "parameters": {
        "options": {},
        "resolve": "includeBoth",
        "mergeByFields": {
          "values": [
            {
              "field1": "email",
              "field2": "email"
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This compareDatasets node performs automated tasks as part of the workflow."
    },
    {
      "id": "7a422493-94d4-4f94-b39c-f6c3980a967c",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        800,
        320
      ],
      "parameters": {
        "rule": {
          "interval": [
            {}
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "b3a0e831-7030-43dd-863a-0c2a4697a14d",
      "name": "MySQL",
      "type": "n8n-nodes-base.mySql",
      "position": [
        1000,
        320
      ],
      "parameters": {
        "query": "SELECT id, name, email, phone, updated_on FROM contact",
        "operation": "executeQuery"
      },
      "credentials": {
        "mySql": {
          "id": "{{ $credentials.mySql.id }}",
          "name": "MySQL account"
        }
      },
      "typeVersion": 1,
      "alw...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "ATxZ5QYhdJq9mZDO",
  "meta": {
    "instanceId": "workflow-324d5d91",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.193898",
    "updatedAt": "2025-09-29T07:07:44.193910",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Parse DMARC reports",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "trigger-1f05344e",
      "name": "Manual Trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        100,
        100
      ],
      "parameters": {}
    },
    {
      "id": "ce9ce59c-3cf6-45db-97fc-825cb8516da8",
      "name": "Email Trigger (IMAP)",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        580,
        300
      ],
      "parameters": {
        "options": {},
        "downloadAttachments": true
      },
      "credentials": {
        "imap": {
          "id": "vx30lEB3JcemyffM",
          "name": "IMAP account"
        }
      },
      "typeVersion": 2,
      "notes": "This emailReadImap node performs automated tasks as part of the workflow."
    },
    {
      "id": "903f949d-ab1e-48ec-a903-a1ebde4cfbe9",
      "name": "End date format",
      "type": "n8n-nodes-base.dateTime",
      "position": [
        800,
        880
      ],
      "parameters": {
        "date": "={{ $json.date_range_end.toDateTime('s') }}",
        "format": "custom",
        "options": {
          "includeInputFields": true
        },
        "operation": "formatDate",
        "customFormat": "yyyy-MM-dd hh:mm:ss",
        "outputFieldName": "=date_range_end"
      },
      "typeVersion": 2,
      "notes": "This dateTime node performs automated tasks as part of the workflow."
    },
    {
      "id": "3303e551-8557-4220-ab24-48fcb0859a26",
      "name": "If multiple records to parse",
  ...

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": "JIegnKLVXTkkTzfO",
  "meta": {
    "instanceId": "workflow-696ed548",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.201904",
    "updatedAt": "2025-09-29T07:07:44.201921",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Daylight Saving Time Notification",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "87b11535-a9ae-49d4-a33f-b895274643e5",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        0,
        0
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "d1cd9157-9948-43fd-a725-2a82a21a82c6",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        340,
        -300
      ],
      "parameters": {
        "width": 394,
        "height": 264,
        "content": "## How it works\n- check list of timezones\n- check if any timezone switches from/to Daylight Saving Time\n- notify on Slack\n\n## Remember to set up\n- Add timezones to \"Timezones List\"\n- Slack notification channel\n"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "0f4369fc-80b6-4fd6-8533-4aacbf4c9c65",
      "name": "Timezones List",
      "type": "n8n-nodes-base.code",
      "position": [
        220,
        0
      ],
      "parameters": {
        "jsCode": "return [\n\t{\n      timezone : \"America/New_York\"\n\t},\n\t{\n      timezone : \"Europe/Warsaw\"\n\t},\n];"
      },
      "typeVersion": 2,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "3c1e6cd7-3812-4670-a53...

Output:
The node 'Calculate Tomorrow's Date' 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 'Calculate Tomorrow's Date'.


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": "8n0VYmvJgISwezyz",
  "meta": {
    "instanceId": "workflow-6908337f",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:44.226760",
    "updatedAt": "2025-09-29T07:07:44.226768",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Build your first AI MCP Server",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "f734e72b-1954-44e8-8633-47b6fa69bfc7",
      "name": "AI Agent",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -440,
        -160
      ],
      "parameters": {
        "options": {
          "systemMessage": "=You are a helpful assistant.\nCurrent datetime is {{ $now.toString() }}"
        }
      },
      "typeVersion": 1.8,
      "notes": "This agent node performs automated tasks as part of the workflow."
    },
    {
      "id": "02c66e36-63e6-48f5-a26a-2c7b1eaf2400",
      "name": "SearchEvent",
      "type": "n8n-nodes-base.googleCalendarTool",
      "position": [
        1180,
        200
      ],
      "parameters": {
        "limit": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Limit', ``, 'number') }}",
        "options": {},
        "timeMax": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Before', ``, 'string') }}",
        "timeMin": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('After', ``, 'string') }}",
        "calendar": {
          "__rl": true,
          "mode": "list",
          "value": "gmsalomao2@gmail.com",
          "cachedResultName": "gmsalomao2@gmail.com"
        },
        "operation": "getAll"
      },
      "credentials": {
        "googleCalendarOAuth2Api": {
          "id": "imp2lyvMg9IpuCwC",
          "name": "Google Calendar account"
        }
      },
      "typeVersion": 1.3,
      "notes": "This googleCalendarTool node performs automated tasks as part of th...

Output:
The node 'Sticky Note4' has a data type mismatch in its parameters.

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'Sticky Note4'.


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:
{
  "name" "Deep Research Report Generation Using Open Router, Google Search, Webhook/Telegram and Notion",
  "nodes": [
    {
      "parameters": {
        "updates": [
          "message"
        ],
        "additionalFields": {}
      },
      "type": "n8n-nodes-base.telegramTrigger",
      "typeVersion": 1.1,
      "position": [
        -860,
        180
      ],
      "id": "db0c8ef2-4859-4df9-a29b-4066998e7926",
      "name": "Telegram Trigger",
      "webhookId": "13911073-fffc-490c-b05b-3628d7a6faa5",
      "notes": "This telegramTrigger node performs automated tasks as part of the workflow."
    },
    {
      "parameters": {
        "sessionIdType": "customKey",
        "sessionKey": "YOUR_CREDENTIAL_HERE",
        "contextWindowLength": 10
      },
      "type": "n8n-nodes-base.noOp",
      "typeVersion": 1.3,
      "position": [
        -480,
        480
      ],
      "id": "49a10f75-eaa2-4466-a568-edfe9084fe30",
      "name": "Simple Memory",
      "notes": "This memoryBufferWindow node performs automated tasks as part of the workflow."
    },
    {
      "parameters": {
        "schemaType": "manual",
        "inputSchema": "{\n   \"is_pass_next\" : \"boolean\",\n   \"message\" : \"string\"\n}"
      },
      "type": "n8n-nodes-base.noOp",
      "typeVersion": 1.2,
      "position": [
        -320,
        480
      ],
      "id": "3c820502-6a10-4ad7-b460-42ea297b0a18",
      "name": "Structured Output Parser",
      "notes": "This outputParserStructured node performs automated tasks as part of the workflow."
    },
    {
      "parameters": {
        "rules": {
          "values": [
            {
              "conditions": {
                "options": {
                  "caseSensitive": true,
                  "leftValue": "",
                  "typeValidation": "strict",
                  "version": 2
                },
                "conditions": [
                  {
                    "leftValue": "={{ $json.output.is_pass_next }}",
        ...

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: 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:
{
  "name": "Pyragogy AI Village - Orchestrazione Master (Architettura Profonda V2)",
  "nodes": [
    {
      "parameters": {},
      "name": "Start",
      "type": "n8n-nodes-base.start",
      "typeVersion": 1,
      "position": [
        50,
        300
      ],
      "id": "node-93a91aca"
    },
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "pyragogy/process",
        "options": {}
      },
      "name": "Webhook Trigger",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 1,
      "position": [
        250,
        300
      ],
      "webhookId": "pyragogy-master-trigger",
      "id": "node-0ce9e907"
    },
    {
      "parameters": {
        "operation": "executeQuery",
        "query": "SELECT 1; -- Verifica connessione DB",
        "options": {}
      },
      "name": "Check DB Connection",
      "type": "n8n-nodes-base.postgres",
      "typeVersion": 1,
      "position": [
        450,
        300
      ],
      "credentials": {
        "postgres": {
          "id": "pyragogy-postgres",
          "name": "Postgres Pyragogy DB"
        }
      },
      "id": "node-67f45b22"
    },
    {
      "parameters": {
        "authentication": "{{ $credentials.apiKey }}",
        "resource": "chat",
        "model": "gpt-4o",
        "messages": [
          {
            "role": "system",
            "content": "You are the Meta-orchestrator of the Pyragogy AI Village. Your task is to analyze the input and determine the optimal agent sequence for processing. Consider the input type, complexity, and goals. Available agents: Summarizer, Synthesizer, Peer Reviewer, Sensemaking Agent, Prompt Engineer, Onboarding/Explainer, Archivist. Return a JSON array of agent names in the order they should run, e.g., [\"Summarizer\", \"Synthesizer\", \"Peer Reviewer\", \"Archivist\"]. Include \"Archivist\" last if persistence is needed."
          },
          {
            "role": "user",
            "content": "Input Data:\n{{ JSON.stringify($js...

Output:
In node 'Send Review Request Email', the parameter 'toEmail' contains an expression that references undefined data.

**Faulty Expression**: `={{ $items[999].json.value }}`
**Original Value**: `human-reviewer@example.com`

**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 'Send Review Request Email' parameter 'toEmail'.