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": "nkMjcOC4hpte1a0t",
  "meta": {
    "instanceId": "3986dc65ca3ddc4ee46e71fc194b0a9d4ef46d960a5e71624f9f7eaa198213cb",
    "templateCredsSetupCompleted": true
  },
  "name": "Extract spend details (template)",
  "tags": [
    {
      "id": "9mCuuNEpnYNvVzb8",
      "name": "Finance",
      "createdAt": "2024-09-15T07:22:30.749Z",
      "updatedAt": "2024-09-15T07:22:30.749Z"
    }
  ],
  "nodes": [
    {
      "id": "8e1e0861-9f06-4fe2-a9c1-423bab246959",
      "name": "Get invoice",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        600,
        380
      ],
      "parameters": {
        "simple": false,
        "filters": {
          "labelIds": [
            "Label_7885838942566773656"
          ]
        },
        "options": {
          "downloadAttachments": true
        },
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "fegneFqi8XJX3NJH",
          "name": "Gmail account (hana@hanamizuki.tw)"
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "364fe355-672a-4074-800a-a7496c4fb1b2",
      "name": "Get payment",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        600,
        580
      ],
      "parameters": {
        "simple": false,
        "filters": {
          "labelIds": [
            "Label_371722915607774622"
          ]
        },
        "options": {
          "downloadAttachments": true
        },
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "fegneFqi8XJX3NJH",
          "name": "Gmail account (hana@hanamizuki.tw)"
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "e3218faf-2486-46e0-bf43-3bc52927e2bd",
      "name": "Extract invoice",
      "type": "n8n-no...

Output:
The node 'Set data 2' 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 'Set data 2'.


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": "aOQANirVMuWrH0ZD",
  "meta": {
    "instanceId": "b78ce2d06ac74b90a581919cf44503cf07404c11eda5c3847597226683145618"
  },
  "name": "Gmail AI auto-responder: create draft replies to incoming emails",
  "tags": [],
  "nodes": [
    {
      "id": "2a9ff08f-919a-41a8-980b-8c2bca3059e4",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        -332.809175564116,
        566.0845437534399
      ],
      "parameters": {
        "simple": false,
        "filters": {
          "q": "-from:me"
        },
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "ofvBTX8A0aWfQb2O",
          "name": "Gmail account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "3ef14615-0045-404f-a21b-2c65a52f4be8",
      "name": "If Needs Reply",
      "type": "n8n-nodes-base.if",
      "position": [
        240,
        560
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "53849246-ad32-4845-9976-9f9688f5a6f2",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $json.needsReply }}",
              "rightValue": "true"
            }
          ]
        }
      },
      "typeVersion": 2
    },
    {
      "id": "36968dd5-8d51-4184-a05a-587b6c95aa82",
      "name": "JSON Parser",
      "type": "@n8n/n8n-nodes-langchain.outputParserStructured",
      "position": [
        100,
        720
      ],
      "parameters": {
        "jsonSchema": "{\n \"type\": \"object\",\n ...

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: 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": "reQhibpNwU63Y8sn",
  "meta": {
    "instanceId": "2128095e13afd30151f0fb53632960213a789cd45ed0afd3a7fb96a985bb4bcf",
    "templateId": "2454",
    "templateCredsSetupCompleted": true
  },
  "name": "Microsoft Outlook AI Email Assistant",
  "tags": [],
  "nodes": [
    {
      "id": "a923cfb0-64fe-499a-8f0e-13fc848731df",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        980,
        540
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "ea865c8e-5c73-4d37-97d1-0349a265b9a4",
      "name": "Sticky Note8",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        2880,
        -600
      ],
      "parameters": {
        "color": 5,
        "width": 675,
        "height": 107,
        "content": "# Microsoft Outlook AI Email Assistant"
      },
      "typeVersion": 1
    },
    {
      "id": "c835042f-421b-44a0-8dc4-686ac638b358",
      "name": "Sticky Note10",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1300,
        60
      ],
      "parameters": {
        "width": 612,
        "height": 401,
        "content": "## Outlook Business with filters\nFilters:\n```\nflag/flagStatus eq 'notFlagged' and not categories/any()\n```\n\nThese filters ensure we do not process flagged emails or email that already have a category set."
      },
      "typeVersion": 1
    },
    {
      "id": "51ae8a4e-2d37-4118-a538-cd0fd4f427f7",
      "name": "Microsoft Outlook23",
      "type": "n8n-nodes-base.microsoftOutlook",
      "position": [
        1540,
        240
      ],
      "parameters": {
        "limit": 10,
        "fields": [
          "flag",
          "from",
          "importance",
          "replyTo",
          "sender",
          "subject",
          "toRecipients",
          "body",
          "categories",
          "isRead"
        ],
        "output": "fields",
        "options": {},
        "filtersUI": {
  ...

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

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "openAiApi": {
    "id": "l2JgpErNc5namHVH",
    "name": "OpenAI account"
  }
}
```

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

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "LGpVLWPpNZSt9ISM",
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "Contact Form Text Classifier for eCommerce",
  "tags": [],
  "nodes": [
    {
      "id": "13175d48-c3a6-4ca6-afed-b70f40289f38",
      "name": "On form submission",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        -480,
        -320
      ],
      "webhookId": "8e10c8ca-895c-4274-ba95-0d646b8bda4e",
      "parameters": {
        "options": {},
        "formTitle": "Contacts",
        "formFields": {
          "values": [
            {
              "fieldLabel": "Name",
              "placeholder": "Name",
              "requiredField": true
            },
            {
              "fieldLabel": "Email",
              "placeholder": "Email",
              "requiredField": true
            },
            {
              "fieldType": "textarea",
              "fieldLabel": "Message",
              "placeholder": "Message",
              "requiredField": true
            }
          ]
        },
        "responseMode": "lastNode",
        "formDescription": "Basic Contact Form"
      },
      "typeVersion": 2.2
    },
    {
      "id": "7b352c9f-5d2e-46ca-9499-594063167e9a",
      "name": "Text Classifier",
      "type": "@n8n/n8n-nodes-langchain.textClassifier",
      "position": [
        -160,
        -320
      ],
      "parameters": {
        "options": {
          "fallback": "other",
          "systemPromptTemplate": "=Please classify the text provided by the user into one of the following categories: {categories}, and use the provided formatting instructions below. Don't explain, and only output the json with the selected {categories}."
        },
        "inputText": "={{ $json.Message }}",
        "categories": {
          "categories": [
            {
              "category": "Request Quote",
              "description": "Request for quote"
          ...

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

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

This very simple workflow is ideal for eCommerce businesses or customer support teams looking to automate and streamline the handling of contact form submissions.

- It is possible to hook any external form such as CF7 for Wordpress through a webhook
- It is possible to send the email through other providers by replacing them with the relative nodes (Gmail, Outlook....)
- It is possible to change the collection database with other tools`

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

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

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

Fix the expression in 'Sticky Note' parameter 'content'.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "a2434c94d549548a685cca39cc4614698e94f527bcea84eefa363f1037ae14cd"
  },
  "nodes": [
    {
      "id": "88c0f64c-a7cd-4f35-96dd-9eee4b1d6a1a",
      "name": "Generate reply",
      "type": "n8n-nodes-base.openAi",
      "position": [
        -480,
        2260
      ],
      "parameters": {
        "prompt": "=From: {{ $json.from.value }}\nTo: {{ $json.to.value }}\nSubject: {{ $json.subject }}\nBody: {{ $json.reply }}\n\n\nReply: ",
        "options": {
          "maxTokens": "={{ $('Configure').first().json.replyTokenSize }}"
        }
      },
      "credentials": {
        "openAiApi": {
          "id": "27",
          "name": "[UPDATE ME]"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "7105b689-9f9c-4354-aad9-8f1abb6c0a06",
      "name": "On email received",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        -2460,
        2680
      ],
      "parameters": {
        "simple": false,
        "filters": {},
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "26",
          "name": "[UPDATE ME]"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "ea18ed9a-0158-45e1-ac1b-1993ace4ff2c",
      "name": "Only continue for specific emails",
      "type": "n8n-nodes-base.if",
      "position": [
        -1360,
        2460
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{ $('Configure').first().json.recipients.split(',') }}",
              "value2": "*",
              "operation": "contains"
            },
            {
              "value1": "={{ $('Configure').first().json.recipients.split(',') }}",
              "value2": "={{ $json.from.value[0].address }}",
              "operation": "contains"
            }
          ]
        },
      ...

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:
{
  "meta": {
    "instanceId": "a2434c94d549548a685cca39cc4614698e94f527bcea84eefa363f1037ae14cd"
  },
  "nodes": [
    {
      "id": "deafa2e8-af41-4f11-92e0-09992f6c6970",
      "name": "Read PDF",
      "type": "n8n-nodes-base.readPDF",
      "position": [
        860,
        1420
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "8e3ddbb1-83a1-4f79-9464-61d5a20f0427",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -760,
        1300
      ],
      "parameters": {
        "width": 444.034812880766,
        "height": 599.5274151436035,
        "content": "## Send specific PDF attachments from Gmail to Google Drive using OpenAI\n\n_**DISCLAIMER**: You may have varying success when using this workflow so be prepared to validate the correctness of OpenAI's results._\n\nThis workflow reads PDF textual content and sends the text to OpenAI. Attachments of interest will then be uploaded to a specified Google Drive folder. For example, you may wish to send invoices received from an email to an inbox folder in Google Drive for later processing. This workflow has been designed to easily change the search term to match your needs. See the workflow for more details.\n\n### How it works\n1. Triggers off on the `On email received` node.\n2. Iterates over the attachments in the email.\n3. Uses the `OpenAI` node to filter out the attachments that do not match the search term set in the `Configure` node. You could match on various PDF files (i.e. invoice, receipt, or contract).\n4. If the PDF attachment matches the search term, the workflow uses the `Google Drive` node to upload the PDF attachment to a specific Google Drive folder.\n\n\nWorkflow written by [David Sha](https://davidsha.me)."
      },
      "typeVersion": 1
    },
    {
      "id": "fb2c3697-a92f-4be1-b9a6-0326f87de70b",
      "name": "Configure",
      "type": "n8n-nodes-base.set",
      "position": [
        -20,
        1520
   ...

Output:
The node 'Is matched' 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 'Is matched'.


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": "QnVdtKiTf3nbrNkh",
  "meta": {
    "instanceId": "558d88703fb65b2d0e44613bc35916258b0f0bf983c5d4730c00c424b77ca36a",
    "templateCredsSetupCompleted": true
  },
  "name": "Summarize emails with A.I. then send to messenger",
  "tags": [],
  "nodes": [
    {
      "id": "50e12e63-df28-45ac-9208-48cbf5116d09",
      "name": "Read emails (IMAP)",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        340,
        260
      ],
      "parameters": {
        "options": {},
        "postProcessAction": "nothing"
      },
      "credentials": {
        "imap": {
          "id": "gXtdakU9M02LBQc3",
          "name": "IMAP account"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "6565350b-2269-44e3-8f36-8797f32d3e09",
      "name": "Send email to A.I. to summarize",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        700,
        260
      ],
      "parameters": {
        "url": "https://openrouter.ai/api/v1/chat/completions",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n \"model\": \"meta-llama/llama-3.1-70b-instruct:free\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"I want you to read and summarize all the emails. If it's not rimportant, just give me a short summary with less than 10 words.\\n\\nHighlight as important if it is, add an emoji to indicate it is urgent:\\nFor the relevant content, find any action items and deadlines. Sometimes I need to sign up before a certain date or pay before a certain date, please highlight that in the summary for me.\\n\\nPut the deadline in BOLD at the top. If the email is not important, keep the summary short to 1 sentence only.\\n\\nHere's the email content for you to read:\\nSender email address: {{ encodeURIComponent($json.from) }}\\nSubject: {{ encodeURIComponent($json.subject) }}\\n{{ encodeURIComponent($json.textHtml) }}\"\n }\n ]\n}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication":...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "6045c639951d83c8706b0dd8d6330164bda01fe58f103cedc2c276bf1f9c11f1"
  },
  "nodes": [
    {
      "id": "d2a24a9b-9cf3-4de0-82e7-5d858658d4b4",
      "name": "Extract specific content",
      "type": "n8n-nodes-base.html",
      "notes": "Extract selected headlines, editor's picks, spotlight etc.",
      "position": [
        800,
        340
      ],
      "parameters": {
        "options": {
          "cleanUpText": true
        },
        "operation": "={{ $items[999].json.value }}",
        "extractionValues": {
          "values": [
            {
              "key": "Headline #1",
              "cssSelector": "#site-content > div:nth-child(1) > section > div > div > div.layout-desktop__grid.layout-desktop__grid--span4.layout-desktop__grid--column-start-1.layout-desktop__grid--row-start-1.layout-desktop__grid--with-border.layout--default > div > div > div > div.story-group-stacked__primary-story > div > div > div > div > div.primary-story__teaser"
            },
            {
              "key": "Headline #2",
              "cssSelector": "#site-content > div:nth-child(1) > section > div > div > div.layout-desktop__grid.layout-desktop__grid--span6.layout-desktop__grid--column-start-5.layout-desktop__grid--row-start-1.layout-desktop__grid--with-border.layout--default > div > div > div > div > div > div.story-group__article.story-group__article--featured > div > div.featured-story-content > div.headline.js-teaser-headline.headline--scale-5.headline--color-black > a > span"
            },
            {
              "key": "Editor's Picks",
              "cssSelector": "#site-content > div:nth-child(1) > section > div > div > div.layout-desktop__grid.layout-desktop__grid--span2.layout-desktop__grid--column-start-11.layout-desktop__grid--row-start-1.layout--default > div"
            },
            {
              "key": "Top Stories",
              "cssSelector": "#site-content > div:nth-child(3) > section > div",
              "ski...

Output:
In node 'Extract specific content', the parameter 'operation' contains an expression that references undefined data.

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

**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 'Extract specific content' parameter 'operation'.


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": "b0KRVIuuUxE5afHo",
  "meta": {
    "instanceId": "98bf0d6aef1dd8b7a752798121440fb171bf7686b95727fd617f43452393daa3",
    "templateCredsSetupCompleted": true
  },
  "name": "Blog Automation TEMPLATE",
  "tags": [
    {
      "id": "uumvgGHY5e6zEL7V",
      "name": "Published Template",
      "createdAt": "2025-02-10T11:18:10.923Z",
      "updatedAt": "2025-02-10T11:18:10.923Z"
    }
  ],
  "nodes": [
    {
      "id": "20e00146-6bda-4a8a-9544-bf7e5fd4e12e",
      "name": "Settings",
      "type": "n8n-nodes-base.set",
      "position": [
        -420,
        -160
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "528b371f-0fba-4be1-9801-0502652da23e",
              "name": "urlSpreadsheet",
              "type": "string",
              "value": "https://docs.google.com/spreadsheets/d/1Kg1-U6mJF4bahH1jCw8kT48MiKz1UMC5n-9q77BHM3Q/edit?gid=0#gid=0"
            },
            {
              "id": "1be018c7-51fe-4ea2-967d-ce47a2e8795c",
              "name": "urlWordpress",
              "type": "string",
              "value": "SUBDOMAIN.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": "y0ur app1 p4ss w0rd"
            },
            {
              "id": "517cb9ff-24fc-41d6-8bcc-253078f56356",
              "name": "sheetSchedule",
              "type": "string",
              "value": "=Schedule"
            },
            {
              "id": "584e11da-546b-4472-8674-33ca7e8f4f30",
              "name": "sheetConfig",
              "type": "string",
              "value": "Config"
            },
           ...

Output:
In node 'Sticky Note12', the parameter 'content' contains an expression that references undefined data.

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

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

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

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

Fix the expression in 'Sticky Note12' parameter 'content'.


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": "gAzsjTGbfWuvAObi",
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "Fine-tuning with OpenAI models",
  "tags": [
    {
      "id": "2VG6RbmUdJ2VZbrj",
      "name": "Google Drive",
      "createdAt": "2024-12-04T16:50:56.177Z",
      "updatedAt": "2024-12-04T16:50:56.177Z"
    },
    {
      "id": "paTcf5QZDJsC2vKY",
      "name": "OpenAI",
      "createdAt": "2024-12-04T16:52:10.768Z",
      "updatedAt": "2024-12-04T16:52:10.768Z"
    }
  ],
  "nodes": [
    {
      "id": "ff65c2db-6a94-4e56-a10c-2538c9617df6",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        220,
        320
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "208fc618-0543-4552-bd65-9c808c879d88",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        440,
        320
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "list",
          "value": "1wvlEcbxFIENvqL-bACzlLEfy5gA6uF9J",
          "cachedResultUrl": "https://drive.google.com/file/d/1wvlEcbxFIENvqL-bACzlLEfy5gA6uF9J/view?usp=drivesdk",
          "cachedResultName": "test_fine_tuning.jsonl"
        },
        "options": {
          "binaryPropertyName": "data.jsonl",
          "googleFileConversion": {
            "conversion": {
              "docsToFormat": "application/pdf"
            }
          }
        },
        "operation": "download"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "HEy5EuZkgPZVEa9w",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 3
    },
    {
      "id": "3580d925-c8c9-446f-bfa4-faae5ed3f44a",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        500,
        800
      ],
      "parame...

Output:
The node 'When chat message received' 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 'When chat message received'.


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": "oNJCLq4egGByMeSl",
  "meta": {
    "instanceId": "1bc0f4fa5e7d17ac362404cbb49337e51e5061e019cfa24022a8667c1f1ce287",
    "templateCredsSetupCompleted": true
  },
  "name": "Remove Advanced Background from Google Drive Images",
  "tags": [],
  "nodes": [
    {
      "id": "99582f98-3707-4480-954a-f091e4e8133a",
      "name": "Config",
      "type": "n8n-nodes-base.set",
      "position": [
        820,
        620
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "42b02a2f-a642-42db-a565-fd2a01a26fb9",
              "name": "bg_color",
              "type": "string",
              "value": "white"
            },
            {
              "id": "f68b2280-ec85-4400-8a98-10e644b56076",
              "name": "padding",
              "type": "string",
              "value": "5%"
            },
            {
              "id": "8bdee3a1-9107-4bf8-adea-332d299e43ae",
              "name": "keepInputSize",
              "type": "boolean",
              "value": true
            },
            {
              "id": "89d9e4fb-ed14-4ee2-b6f0-73035bafbc39",
              "name": "outputSize",
              "type": "string",
              "value": "1600x1600"
            },
            {
              "id": "ad53bf64-5493-4c4d-a52c-cd4d657cc9f9",
              "name": "inputFileName",
              "type": "string",
              "value": "={{ $json.originalFilename }}"
            },
            {
              "id": "9fc440c6-289b-4a6a-8391-479a6660836f",
              "name": "OutputDriveFolder",
              "type": "string",
              "value": "ENTER GOOGLE DRIVE FOLDER URL"
            },
            {
              "id": "f0f1767a-b659-48c4-bef6-8ee4111cb939",
              "name": "api-key",
              "type": "string",
              "value": "ENTER API KEY"
            }
          ]
        }
      },
      "typeVersion": 3.4
    },
    {
      "id": "7b5973d4-...

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: 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": "AjJ7O98qjw8XVirk",
  "meta": {
    "instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
    "templateCredsSetupCompleted": true
  },
  "name": "Build an OpenAI Assistant with Google Drive Integration",
  "tags": [
    {
      "id": "2VG6RbmUdJ2VZbrj",
      "name": "Google Drive",
      "createdAt": "2024-12-04T16:50:56.177Z",
      "updatedAt": "2024-12-04T16:50:56.177Z"
    },
    {
      "id": "paTcf5QZDJsC2vKY",
      "name": "OpenAI",
      "createdAt": "2024-12-04T16:52:10.768Z",
      "updatedAt": "2024-12-04T16:52:10.768Z"
    }
  ],
  "nodes": [
    {
      "id": "8a00e7b2-8348-47d2-87db-fe40b41a44f1",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        180,
        260
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "1d8fe39a-c7b9-4c38-9dc6-0fbce63151ba",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        480,
        380
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "list",
          "value": "1JG7ru_jBcWu5fvgG3ayKjXVXHVy67CTqLwNITqsSwh8",
          "cachedResultUrl": "https://docs.google.com/document/d/1JG7ru_jBcWu5fvgG3ayKjXVXHVy67CTqLwNITqsSwh8/edit?usp=drivesdk",
          "cachedResultName": "[TEST] Assistente Agenzia viaggi"
        },
        "options": {
          "binaryPropertyName": "data.pdf",
          "googleFileConversion": {
            "conversion": {
              "docsToFormat": "application/pdf"
            }
          }
        },
        "operation": "download"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "HEy5EuZkgPZVEa9w",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 3
    },
    {
      "id": "a8a72d6e-8278-4786-915d-311a2d8f5894",
      "name": "When chat message received",
      "type": "@n8n/n8n-nodes-langchain...

Output:
The node 'OpenAI1' (type: @n8n/n8n-nodes-langchain.openAi) requires credentials but the 'credentials' configuration is missing.

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "openAiApi": {
    "id": "CDX6QM4gLYanh0P4",
    "name": "OpenAi account"
  }
}
```

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

Add credentials configuration to the 'OpenAI1' node.


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

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

Workflow JSON:
{
  "id": "ZVUQL1bUQ8gBCZTl",
  "meta": {
    "instanceId": "23e6ce638471979c8a2c72a9fb50e44f4f2bfd5a9fc2f5b7f5c842b9abeb9393"
  },
  "name": "Chat with Google Sheet",
  "tags": [],
  "nodes": [
    {
      "id": "89af21df-1125-4df6-9d43-a643e02bb53f",
      "name": "Execute Workflow Trigger",
      "type": "n8n-nodes-base.executeWorkflowTrigger",
      "position": [
        540,
        1240
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "f571d0cc-eb43-46c9-bdd5-45abc51dfbe7",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        461.9740563285368,
        970.616715060075
      ],
      "parameters": {
        "color": 7,
        "width": 1449.2963504228514,
        "height": 612.0936015224503,
        "content": "### Sub-workflow: Custom tool\nThis can be called by the agent above. It returns three different types of data from the Google Sheet, which can be used together for more complex queries without returning the whole sheet (which might be too big for GPT to handle)"
      },
      "typeVersion": 1
    },
    {
      "id": "8761e314-c1f2-4edd-88ea-bfeb02dc8f1a",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        460,
        460
      ],
      "parameters": {
        "color": 7,
        "width": 927.5,
        "height": 486.5625,
        "content": "### Main workflow: AI agent using custom tool"
      },
      "typeVersion": 1
    },
    {
      "id": "e793b816-68d9-42ef-b9b0-6fe22aa375e8",
      "name": "Sticky Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        300,
        540
      ],
      "parameters": {
        "width": 185.9375,
        "height": 183.85014518022527,
        "content": "## Try me out\n\nClick the 'Chat' button at the bottom and enter:\n\n_Which is our biggest customer?_"
      },
      "typeVersion": 1
    },
    {
      "id": "f895d926-0f70-415b-9492-c3ecf186e761",
      "name":...

Output:
The workflow has a broken data flow. The node 'List columns tool' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'List columns tool'.

**Impact**: Data from 'List columns tool' will not flow to any downstream nodes, effectively stopping the workflow at this point.

**Solution**:
1. Open the workflow in the n8n editor
2. Draw a connection from 'List columns tool' to the next node in the flow
3. Verify the connection appears in the connections object

**Programmatic Fix**: Add the connection back to the workflow JSON:
```json
"connections": {
  "List columns tool": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'List columns tool' to the workflow.


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

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

Workflow JSON:
{
  "id": "bV0JTA5NtRZxiD1q",
  "meta": {
    "instanceId": "98bf0d6aef1dd8b7a752798121440fb171bf7686b95727fd617f43452393daa3",
    "templateCredsSetupCompleted": true
  },
  "name": "Telegram-bot AI Da Nang",
  "tags": [],
  "nodes": [
    {
      "id": "ae5f9ca6-6bba-4fe8-b955-6c615d8a522f",
      "name": "SendTyping",
      "type": "n8n-nodes-base.telegram",
      "position": [
        -1780,
        -260
      ],
      "webhookId": "26ea953e-93d9-463e-ad90-95ea8ccb449f",
      "parameters": {
        "chatId": "={{ $('telegramInput').item.json.message.chat.id }}",
        "operation": "sendChatAction"
      },
      "credentials": {
        "telegramApi": {
          "id": "V3EtQBeqEvnOtl9p",
          "name": "Telegram account"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "244e7be3-2caa-46f7-8628-d063a3b84c12",
      "name": "SetResponse",
      "type": "n8n-nodes-base.set",
      "notes": "Assemble response etc.",
      "position": [
        40,
        -420
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "fba8dc48-1484-4aae-8922-06fcae398f05",
              "name": "responseMessage",
              "type": "string",
              "value": "={{ $json.output }}"
            },
            {
              "id": "df8243e6-6a24-4bad-8807-63d75c828150",
              "name": "",
              "type": "string",
              "value": ""
            }
          ]
        },
        "includeOtherFields": true
      },
      "notesInFlow": true,
      "typeVersion": 3.4
    },
    {
      "id": "192aa194-f131-4ba3-8842-7c88da1a6129",
      "name": "Settings",
      "type": "n8n-nodes-base.set",
      "position": [
        -1260,
        -420
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "6714203d-04b3-4a3c-9183-09cddcffdfe8",
              "name": "scheduleURL",
 ...

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

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

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

**Solutions**:

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

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

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

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "dDAqkobn2pqgdl2N",
  "meta": {
    "instanceId": "9e331a89ae45a204c6dee51c77131d32a8c962ec20ccf002135ea60bd285dba9"
  },
  "name": "AI Logo Sheet Extractor to Airtable",
  "tags": [],
  "nodes": [
    {
      "id": "f7ecadb8-dc5d-4e8c-96b8-52c1dbad49b6",
      "name": "On form submission",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        -660,
        -220
      ],
      "webhookId": "43837a27-f752-40a8-852a-d5d63d647bfd",
      "parameters": {
        "options": {
          "path": "logo-sheet-feeder"
        },
        "formTitle": "AI Logo Sheet Feeder",
        "formFields": {
          "values": [
            {
              "fieldType": "file",
              "fieldLabel": "The Logo-Sheet as Image",
              "requiredField": true
            },
            {
              "fieldLabel": "Addional Prompt (e.g.: What the meaning of the graphic?) *optional but helps from time to time.",
              "placeholder": "It's a graph chart comparing AI Tools"
            }
          ]
        },
        "formDescription": "Provide a Image with multiple Logos comparing or bringing multiple Tools into Context with one another."
      },
      "typeVersion": 2.2
    },
    {
      "id": "b1530578-bde9-4ee3-9cdb-545a621cdb84",
      "name": "Retrieve and Parser Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        -180,
        -220
      ],
      "parameters": {
        "options": {
          "systemMessage": "Your task is to retrieve Information from the given Input. Extract Categories and Attributes of all given and shown Tools, Softwares or Products you've got by the user.\n\nProvide the Output Array of Tools with the following Structure as JSON:\n\n[{\n\"name\": \"Name of the Tool, Software, etc.\",\n\"attributes\": [\"Some category or attribute\", \"something else you can see from the context or image\"],\n\"similar\": [\"similar tool, product, etc. from shown context\", \"another similar software, p...

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

Remove the trailing comma before the closing brace.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "nJwkSOrJIFvutw1n:
  "meta": {
    "instanceId": "08daa2aa5b6032ff63690600b74f68f5b0f34a3b100102e019b35c4419168977"
  },
  "name": "Flux Dev Image Generation Fal.ai",
  "tags": [],
  "nodes": [
    {
      "id": "00f3a7d9-9931-40a4-8eb5-5b9086d6995c",
      "name": "Fal Flux",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        420,
        0
      ],
      "parameters": {
        "url": "https://queue.fal.run/fal-ai/flux/dev",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n \"prompt\": \"{{ $json.Prompt }}\",\n \"image_size\": {\n \"width\": {{ $json.Width }},\n \"height\": {{ $json.Height }}\n},\n \"num_inference_steps\": {{ $json.Steps }},\n \"guidance_scale\": {{ $json.Guidance }},\n \"num_images\": 1,\n \"enable_safety_checker\": true\n}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "lNxvZHlUafPAHBYN",
          "name": "Fal Flux Header Auth account"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "3032a543-2e21-415e-a5bd-d56ea33e4411",
      "name": "Get Image Result URL",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1220,
        -20
      ],
      "parameters": {
        "url": "=https://queue.fal.run/fal-ai/flux/requests/{{ $json.request_id }}",
        "options": {},
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "lNxvZHlUafPAHBYN",
          "name": "Fal Flux Header Auth account"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "56e13e53-1697-4970-9bea-b75e0e849425",
      "name": "Download Image",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1400,
        -20
      ],
      "parameters": {
        "url"...

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: 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": "8FLJK1NsduFL0Y5P",
  "meta": {
    "instanceId": "fb924c73af8f703905bc09c9ee8076f48c17b596ed05b18c0ff86915ef8a7c4a"
  },
  "name": "Qualify new leads in Google Sheets via OpenAI's GPT-4",
  "tags": [
    {
      "id": "y9tvM3hISJKT2jeo",
      "name": "Ted's Tech Talks",
      "createdAt": "2023-08-15T22:12:34.260Z",
      "updatedAt": "2023-08-15T22:12:34.260Z"
    }
  ],
  "nodes": [
    {
      "id": "1f179325-0bec-4e5c-8ebd-0a2bb3ebefaa",
      "name": "Merge",
      "type": "n8n-nodes-base.merge",
      "position": [
        1440,
        340
      ],
      "parameters": {
        "mode": "combine",
        "options": {},
        "combinationMode": "mergeByPosition"
      },
      "typeVersion": 2.1
    },
    {
      "id": "7b548661-2b32-451f-ba52-91ca86728f1e",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        358,
        136.3642172523962
      ],
      "parameters": {
        "width": 442,
        "height": 360.6357827476038,
        "content": "### 1. Create a Google Sheet document\n* This template uses Google Sheet document connected to Google Forms, but a standalone Sheet document will work too\n* Adapt initial trigger to your needs: check for new entries periodically or add a manual trigger\n\n[Link to the Google Sheet template](https://docs.google.com/spreadsheets/d/1jk8ZbfOMObvHGGImc0sBJTZB_hracO4jRqfbryMgzEs)"
      },
      "typeVersion": 1
    },
    {
      "id": "308b4dce-4656-47bd-b217-69565b1c34f6",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        820,
        420
      ],
      "parameters": {
        "width": 471,
        "height": 322,
        "content": "### 2. Provide lead qualification instructions\n* Create a __system message__ with overall instructions\n* Add a __user message__ with the JSON variables\n* Set node parses the resulting JSON object, but you can also request a plain string response in the system message"
      }...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "7cXvgkl9170QXzT2",
  "meta": {
    "instanceId": "69133932b9ba8e1ef14816d0b63297bb44feb97c19f759b5d153ff6b0c59e18d",
    "templateCredsSetupCompleted": true
  },
  "name": "RAG Workflow For Company Documents stored in Google Drive",
  "tags": [],
  "nodes": [
    {
      "id": "753455a3-ddc8-4a74-b043-70a0af38ff9e",
      "name": "Pinecone Vector Store",
      "type": "@n8n/n8n-nodes-langchain.vectorStorePinecone",
      "position": [
        680,
        0
      ],
      "parameters": {
        "mode": "insert",
        "options": {},
        "pineconeIndex": {
          "__rl": true,
          "mode": "list",
          "value": "company-files",
          "cachedResultName": "company-files"
        }
      },
      "credentials": {
        "pineconeApi": {
          "id": "bQTNry52ypGLqt47",
          "name": "PineconeApi account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "a7c8fa7f-cad2-4497-a295-30aa2e98cacc",
      "name": "Embeddings Google Gemini",
      "type": "@n8n/n8n-nodes-langchain.embeddingsGoogleGemini",
      "position": [
        640,
        280
      ],
      "parameters": {
        "modelName": "models/text-embedding-004"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "jLOqyTR4yTT1nYKi",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "215f0519-4359-4e4b-a90c-7e54b1cc52b5",
      "name": "Default Data Loader",
      "type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
      "position": [
        840,
        220
      ],
      "parameters": {
        "options": {},
        "dataType": "binary",
        "binaryMode": "specificField"
      },
      "typeVersion": 1
    },
    {
      "id": "863d3d1d-1621-406e-8320-688f64b07b09",
      "name": "Recursive Character Text Splitter",
      "type": "@n8n/n8n-nodes-langchain.textSplitterRecursiveCharacterTextSplitter",
      "position": [
        820,
        420
  ...

Output:
The node 'Google Gemini 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 'Google Gemini Chat Model'.


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": "VY4WBXuNDPxmOO5e",
  "meta": {
    "instanceId": "d16fb7d4b3eb9b9d4ad2ee6a7fbae593d73e9715e51f583c2a0e9acd1781c08e",
    "templateCredsSetupCompleted": true
  },
  "name": "RAG:Context-Aware Chunking | Google Drive to Pinecone via OpenRouter & Gemini",
  "tags": [
    {
      "id": "XZIQK6NdzGvgbZFd",
      "name": "Sell",
      "createdAt": "2025-01-15T12:28:48.424Z",
      "updatedAt": "2025-01-15T12:28:48.424Z"
    }
  ],
  "nodes": [
    {
      "id": "7abbfa6e-4b17-4656-9b82-377b1bacf539",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        0,
        0
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "448ec137-bf64-46b4-bf15-c7a040faa306",
      "name": "Loop Over Items",
      "type": "n8n-nodes-base.splitInBatches",
      "position": [
        1100,
        0
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 3
    },
    {
      "id": "f22557ee-7f37-40cd-9063-a9a759274663",
      "name": "OpenRouter Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter",
      "position": [
        20,
        440
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openRouterApi": {
          "id": "ddH6iNlm09UxrXvu",
          "name": "Auto: OpenRouter"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "57e8792e-25ae-43d5-b4e9-e87642365ee9",
      "name": "Pinecone Vector Store",
      "type": "@n8n/n8n-nodes-langchain.vectorStorePinecone",
      "position": [
        780,
        360
      ],
      "parameters": {
        "mode": "insert",
        "options": {},
        "pineconeIndex": {
          "__rl": true,
          "mode": "list",
          "value": "context-rag-test",
          "cachedResultName": "context-rag-test"
        }
      },
      "credentials": {
        "pineconeApi": {
          "id": "R3QGXSEIRTEAZttK",
          "name": "Aut...

Output:
The node 'Get Document From Google Drive' (type: n8n-nodes-base.googleDrive) 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": {
  "googleDriveOAuth2Api": {
    "id": "SsiQguNA8w3Wwv4w",
    "name": "Auto: Google Drive"
  }
}
```

**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 'Get Document From Google Drive' node.


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

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

Workflow JSON:
{
  "id": "ES4TSw9HacxoNhLZ",
  "meta": {
    "instanceId": "5219bc76ea806909b58e13e2acac1c19192522e70dc3c90467e1800e94864105",
    "templateCredsSetupCompleted": true
  },
  "name": "AI CV Screening Workflow",
  "tags": [],
  "nodes": [
    {
      "id": "e77fbc32-5ee9-49b4-93d5-f2ffda134b08",
      "name": "Google Gemini Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
      "position": [
        1230,
        530
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "googlePalmApi": {
          "id": "UcdfdADI6w9nkgg5",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "9e24167f-cac6-4b98-95da-30065510d79a",
      "name": "Confirmation of CV Submission",
      "type": "n8n-nodes-base.gmail",
      "position": [
        1780,
        460
      ],
      "webhookId": "954756dc-2946-4b78-b208-06f3df612ab5",
      "parameters": {
        "sendTo": "={{ $('Application Form').item.json['E-mail'] }}",
        "message": "=Dear {{ $('Application Form').item.json['Full Name'] }}, \n\nThank you for submitting your CV. We have received it and will review it shortly. \n\nBest regards,\nMediusware",
        "options": {},
        "subject": "We Have Received Your CV"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "taFlf0vD5S4QlOKM",
          "name": "Gmail account"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "ff49d370-b4eb-4426-b396-763455e647e7",
      "name": "Inform HR New CV Received",
      "type": "n8n-nodes-base.gmail",
      "position": [
        1760,
        200
      ],
      "webhookId": "e969a9f5-631b-4719-a4f6-87e6063cef6a",
      "parameters": {
        "sendTo": "sarfaraz@mediusaware.com",
        "message": "=Hello HR,\n\nA new CV has been successfully received in our system. Please review the candidate's details at your earliest convenience.\n\nCandidate Name: {{ $('Application...

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": "aLTkMiEDYXbMK4fT",
  "meta": {
    "instanceId": "5b860a91d7844b5237bb51cc58691ca8c3dc5b576f42d4d6bbedfb8d43d58ece",
    "templateCredsSetupCompleted": true
  },
  "name": "AI agent: expense tracker in Google Sheets and n8n chat",
  "tags": [],
  "nodes": [
    {
      "id": "9260b53e-6848-4f34-9643-311c58c807f6",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        360,
        40
      ],
      "parameters": {
        "options": {
          "maxIterations": 3,
          "systemMessage": "You are a helpful accountant. Use save to db tool to save expense message to DB. respond with \"Your expense saved, here is the output of save sub-workflow:[data]\""
        }
      },
      "typeVersion": 1.7
    },
    {
      "id": "0d7a686c-42c2-4223-9f78-b454788fb6da",
      "name": "When chat message received",
      "type": "@n8n/n8n-nodes-langchain.chatTrigger",
      "position": [
        0,
        40
      ],
      "webhookId": "6a34ec84-459d-4cc4-83b6-06ae4c99dc8f",
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.1
    },
    {
      "id": "f1f27aaf-cf13-40d9-b8f9-800a862f8bf0",
      "name": "Workflow Input Trigger",
      "type": "n8n-nodes-base.executeWorkflowTrigger",
      "position": [
        180,
        600
      ],
      "parameters": {
        "workflowInputs": {
          "values": [
            {
              "name": "input1"
            }
          ]
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "a1530601-1a91-45be-adef-2e0608bfe773",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        340,
        300
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "vHFEeel4RHFsjcMI",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "c6f9782e-6b9b-421e-8b10-9ef04cbbee...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "Lwvu2jjMU2irTyAY",
  "meta": {
    "instanceId": "fb924c73af8f703905bc09c9ee8076f48c17b596ed05b18c0ff86915ef8a7c4a"
  },
  "name": "Summarize Google Sheets form feedback via OpenAI's GPT-4",
  "tags": [
    {
      "id": "y9tvM3hISJKT2jeo",
      "name": "Ted's Tech Talks",
      "createdAt": "2023-08-15T22:12:34.260Z",
      "updatedAt": "2023-08-15T22:12:34.260Z"
    }
  ],
  "nodes": [
    {
      "id": "cd80cd2f-a6e1-48eb-ba05-0f8f1a0875e5",
      "name": "When clicking \"Test workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        680,
        320
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "9f03f1c4-c47e-4eda-bc0a-a598c21e4616",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        640,
        130
      ],
      "parameters": {
        "width": 369.1031874662338,
        "height": 349,
        "content": "### 1. Create a Google Sheet document\n* This tutorial uses Google Sheet document connected to Google Forms, but a standalone Sheet document will work too\n* Adapt initial trigger to your needs: run manually or at some time intervals\n\n[Link to the Google Sheets template](https://docs.google.com/spreadsheets/d/1Kcr1oF_RrfNQJczmJDpwClOSYpvSnwbeX-_pdUo91-I/edit?usp=sharing)"
      },
      "typeVersion": 1
    },
    {
      "id": "1e478f81-76e7-4fc3-a147-11a92d3f9998",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1040,
        160
      ],
      "parameters": {
        "width": 394,
        "height": 319,
        "content": "### 2. Combine all answers into an array\n* Since the main goal is to provide an overall summary, we need to combine all answers for each Google Form question\n* Aggregate Node takes multiple incoming items and produces just a single item which contains arrays of user feedback"
      },
      "typeVersion": 1
    },
    {
      "id": "1ab06b51-3b9e-4a4c-afba-c...

Output:
The node 'Summarize via GPT model' (type: n8n-nodes-base.openAi) requires credentials but the 'credentials' configuration is missing.

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "openAiApi": {
    "id": "rveqdSfp7pCRON1T",
    "name": "Ted's Tech Talks OpenAi"
  }
}
```

**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 'Summarize via GPT model' node.


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

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

Workflow JSON:
{
  "id": "s8YgrWCxnGJxbctt",
  "meta": {
    "instanceId": "2b1c62c6d8c9216d51c1f40c64044e24b558ea8311c19d032d1278472159cfec",
    "templateId": "1750"
  },
  "name": "Google Doc Summarizer to Google Sheets",
  "tags": [],
  "nodes": [
    {
      "id": "9098b59a-68b1-48bd-9b52-41a971e689b3",
      "name": "Google Docs",
      "type": "n8n-nodes-base.googleDocs",
      "position": [
        340,
        240
      ],
      "parameters": {
        "operation": "get",
        "documentURL": "={{ $json.id }}",
        "authentication": "serviceAccount"
      },
      "credentials": {
        "googleApi": {
          "id": "Xx4ObVZ3yYoA5XCx",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "a7f224d4-232b-4201-82a0-d762830b546a",
      "name": "Wikipedia",
      "type": "@n8n/n8n-nodes-langchain.toolWikipedia",
      "position": [
        680,
        180
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "12bb798e-fe7e-4340-846b-5caeb824959b",
      "name": "Calculator",
      "type": "@n8n/n8n-nodes-langchain.toolCalculator",
      "position": [
        940,
        180
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "7d479725-f973-45c5-a798-d1868aefdd82",
      "name": "Google Sheets",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1280,
        280
      ],
      "parameters": {
        "columns": {
          "value": {
            "Name": "={{ $('Google Drive ').item.json.lastModifyingUser.displayName }}",
            "Email ": "={{ $('Google Drive ').item.json.lastModifyingUser.emailAddress }}",
            "Summarise Conetent data ": "={{ $json.message.content }}"
          },
          "schema": [
            {
              "id": "Email ",
              "type": "string",
              "display": true,
              "required": false,
              "displayName": "Email ",
              "defaultMatch": false,
       ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "cZPEH5aMMZNy61xs",
  "meta": {
    "instanceId": "3378b0d68c3b7ebfc71b79896d94e1a044dec38e99a1160aed4e9c323910fbe2",
    "templateCredsSetupCompleted": true
  },
  "name": "template in store",
  "tags": [],
  "nodes": [
    {
      "id": "14f93cdb-72cb-419a-b8d7-a68ae9383290",
      "name": "Google Drive Trigger",
      "type": "n8n-nodes-base.googleDriveTrigger",
      "position": [
        440,
        320
      ],
      "parameters": {
        "event": "fileCreated",
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        },
        "triggerOn": "specificFolder",
        "folderToWatch": {
          "__rl": true,
          "mode": "list",
          "value": "18m0i341QLQuyWuHv_FBdz8-r-QDtofYm",
          "cachedResultUrl": "https://drive.google.com/drive/folders/18m0i341QLQuyWuHv_FBdz8-r-QDtofYm",
          "cachedResultName": "Influencersde"
        }
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "2TbhWtnbRfSloGxX",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "d4ab0d11-b110-46fa-9cd2-6091737c302e",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        620,
        320
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "",
          "value": "={{ $json.id || $json.data[0].id }}"
        },
        "options": {},
        "operation": "download",
        "authentication": "oAuth2"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "2TbhWtnbRfSloGxX",
          "name": "Google Drive account"
        }
      },
      "retryOnFail": true,
      "typeVersion": 1,
      "waitBetweenTries": 5000
    },
    {
      "id": "fde9df88-3f9e-4732-bb1c-72eb33ce6826",
      "name": "Error Trigger",
      "type": "n8n-nodes-base.errorTrigger",
      "position": ...

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: 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": "PpFVCrTiYoa35q1m",
  "meta": {
    "instanceId": "b9faf72fe0d7c3be94b3ebff0778790b50b135c336412d28fd4fca2cbbf8d1f5",
    "templateCredsSetupCompleted": true
  },
  "name": "Vision-Based AI Agent Scraper - with Google Sheets, ScrapingBee, and Gemini",
  "tags": [],
  "nodes": [
    {
      "id": "90ac8845-342e-4fdb-ae09-cb9d169b4119",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        160,
        460
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "7a2bfc41-1527-448d-a52c-794ca4c9e7ee",
      "name": "ScrapingBee- Get page HTML",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        2280,
        1360
      ],
      "parameters": {
        "url": "https://app.scrapingbee.com/api/v1",
        "options": {},
        "sendQuery": true,
        "queryParameters": {
          "parameters": [
            {
              "name": "api_key",
              "value": "<your_scrapingbee_apikey>"
            },
            {
              "name": "url",
              "value": "={{$json.url}}"
            }
          ]
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "a0ab6dcb-ffad-40bf-8a22-f2e152e69b00",
      "name": "Structured Output Parser",
      "type": "@n8n/n8n-nodes-langchain.outputParserStructured",
      "position": [
        2480,
        880
      ],
      "parameters": {
        "jsonSchemaExample": "[{\n \"product_title\":\"The title of the product\",\n \"product_price\":\"The price of the product\",\n \"product_brand\": \"The brand of the product\",\n \"promo\":\"true or false\",\n \"promo_percentage\":\"NUM %\"\n}]"
      },
      "typeVersion": 1.2
    },
    {
      "id": "34f50603-a969-425d-8a1a-ec8031a5cdfd",
      "name": "Google Gemini Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
      "position": [
        1800,
        900
      ],
      "parameters": {
        "opti...

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

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "dYjQS1bJmVSAxNnj",
  "meta": {
    "instanceId": "a9f3b18652ddc96459b459de4fa8fa33252fb820a9e5a1593074f3580352864a",
    "templateCredsSetupCompleted": true
  },
  "name": "BambooHR AI-Powered Company Policies and Benefits Chatbot",
  "tags": [],
  "nodes": [
    {
      "id": "832e4a1d-320f-4793-be3c-8829776a3ce6",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        760,
        560
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "63be0638-d7df-4af8-ba56-555593a6de0c",
      "name": "Default Data Loader",
      "type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
      "position": [
        2080,
        740
      ],
      "parameters": {
        "options": {},
        "dataType": "binary"
      },
      "typeVersion": 1
    },
    {
      "id": "ffe33bb2-efd0-4b6e-a146-aaded7c28304",
      "name": "Embeddings OpenAI",
      "type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
      "position": [
        1860,
        740
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "XXXXXX",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "32de5318-ea5d-4951-b81c-3c96167bc320",
      "name": "Recursive Character Text Splitter",
      "type": "@n8n/n8n-nodes-langchain.textSplitterRecursiveCharacterTextSplitter",
      "position": [
        2060,
        880
      ],
      "parameters": {
        "options": {},
        "chunkOverlap": 100
      },
      "typeVersion": 1
    },
    {
      "id": "6306d263-16c1-4a68-9318-c58fea1e3e62",
      "name": "Window Buffer Memory",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "position": [
        1000,
        1340
      ],
      "parameters": {},
      "typeVersion": 1.2
    },
    {
      "id": "364cf0ce-524c-4b61-89f3-40b2801bc7e3",
      "name": "OpenAI C...

Output:
In node 'Sticky Note2', the parameter 'content' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json.deeply.nested.undefined.path }}`
**Original Value**: `## (Optional) STEP #2: Set up employee lookup tool`

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

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

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

Fix the expression in 'Sticky Note2' parameter 'content'.


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": "6a2a7715680b8313f7cb4676321c5baa46680adfb913072f089f2766f42e43bd"
  },
  "nodes": [
    {
      "id": "0f3b39af-2802-462c-ac54-a7bccf5b78c5",
      "name": "Extract Document PDF",
      "type": "n8n-nodes-base.extractFromFile",
      "position": [
        520,
        400
      ],
      "parameters": {
        "options": {},
        "operation": "pdf"
      },
      "typeVersion": 1,
      "alwaysOutputData": false
    },
    {
      "id": "6f76e3a6-a3be-4f9f-a0db-3f002eafc2ad",
      "name": "Download File",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        340,
        400
      ],
      "parameters": {
        "url": "={{ $json.file_url }}",
        "options": {}
      },
      "typeVersion": 4.2
    },
    {
      "id": "2c4e0b0f-28c7-48f5-b051-6e909ac878d2",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -20,
        400
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "a70d972b-ceb4-4f4d-8737-f0be624d6234",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        120,
        280
      ],
      "parameters": {
        "width": 187.37066290133808,
        "height": 80,
        "content": "**Add direct link to CV and Job description**"
      },
      "typeVersion": 1
    },
    {
      "id": "9fdff1be-14cf-4167-af2d-7c5e60943831",
      "name": "Sticky Note5",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -800,
        140
      ],
      "parameters": {
        "color": 7,
        "width": 280.2462120317618,
        "height": 438.5821431288714,
        "content": "### Setup\n\n1. **Download File**: Fetch the CV using its direct URL.\n2. **Extract Data**: Use N8N\u2019s PDF or text extraction nodes to retrieve text from the CV.\n3. **Send to OpenAI**:\n - **URL**: POST to OpenAI\u2019s API for analysis.\n - **Parameters**:\n - I...

Output:
The node 'OpenAI - Analyze CV' (type: n8n-nodes-base.httpRequest) requires credentials but the 'credentials' configuration is missing.

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "openAiApi": {
    "id": "SphXAX7rlwRLkiox",
    "name": "Test club key"
  }
}
```

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

Add credentials configuration to the 'OpenAI - Analyze CV' node.


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

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

Workflow JSON:
{
  "id": "zmgSshZ5xESr3ozl",
  "meta": {
    "instanceId": "1fedaf0aa3a5d200ffa1bbc98554b56cac895dd5d001907cb6f1c7a3c0a78215",
    "templateCredsSetupCompleted": true
  },
  "name": "HR & IT Helpdesk Chatbot with Audio Transcription",
  "tags": [],
  "nodes": [
    {
      "id": "c6cb921e-97ac-48f6-9d79-133993dd6ef7",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -300,
        -280
      ],
      "parameters": {
        "color": 7,
        "width": 780,
        "height": 460,
        "content": "## 1. Download & Extract Internal Policy Documents\n[Read more about the HTTP Request Tool](https://docs.n8n.io/integrations/builtin/core-nodes/n8n-nodes-base.httprequest)\n\nBegin by importing the PDF documents that contain your internal policies and FAQs\u2014these will become the knowledge base for your Internal Helpdesk Assistant. For example, you can store a company handbook or IT/HR policy PDFs on a shared drive or cloud storage and reference a direct download link here.\n\nIn this demonstration, we'll use the **HTTP Request node** to fetch the PDF file from a given URL and then parse its text contents using the **Extract from File node**. Once extracted, these text chunks will be used to build the vector store that underpins your helpdesk chatbot\u2019s responses.\n\n[Example Employee Handbook with Policies](https://s3.amazonaws.com/scschoolfiles/656/employee_handbook_print_1.pdf)"
      },
      "typeVersion": 1
    },
    {
      "id": "450a254c-eec3-41ea-a11d-eb87b62ee4f4",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -80,
        20
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "0972f31c-1f62-430c-8beb-bef8976cd0eb",
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        100,
        20
      ],
      "parameters": {
        "url": "https://s3.a...

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


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" "eMxH0GjgfWEvBDic",
  "meta": {
    "instanceId": "be27b2af86ae3a5dc19ef2a1947644c0aec45fd8c88f29daa7dea6f0ce537691"
  },
  "name": "HR Job Posting and Evaluation with AI",
  "tags": [
    {
      "id": "9ZApRtWeNXlymyQ6",
      "name": "HR",
      "createdAt": "2025-01-08T08:47:43.054Z",
      "updatedAt": "2025-01-08T08:47:43.054Z"
    }
  ],
  "nodes": [
    {
      "id": "450e15b2-bddf-4853-b44e-822facaac14d",
      "name": "On form submission",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        -700,
        -80
      ],
      "webhookId": "18f7428c-9990-413f-aff3-bdcca1bbbe2d",
      "parameters": {
        "options": {
          "path": "automation-specialist-application",
          "ignoreBots": false,
          "buttonLabel": "Submit",
          "appendAttribution": false,
          "useWorkflowTimezone": true
        },
        "formTitle": "Job Application",
        "formFields": {
          "values": [
            {
              "fieldLabel": "First Name",
              "requiredField": true
            },
            {
              "fieldLabel": "Last Name",
              "requiredField": true
            },
            {
              "fieldType": "email",
              "fieldLabel": "Email",
              "requiredField": true
            },
            {
              "fieldType": "number",
              "fieldLabel": "Phone",
              "requiredField": true
            },
            {
              "fieldType": "number",
              "fieldLabel": "Years of experience",
              "requiredField": true
            },
            {
              "fieldType": "file",
              "fieldLabel": "Upload your CV",
              "requiredField": true,
              "acceptFileTypes": ".pdf"
            }
          ]
        },
        "formDescription": "=Fill this for to apply for the role Automation Specialist:\n\nLocation: Remote\nExperience: Minimum 3 years\nEmployment Type: Full-time\n\nJob Description:\nWe a...

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

Add the missing colon after the property name.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "qww129cm4TM9N8Ru",
  "meta": {
    "instanceId": "038da3428bba4563b42be267feeca21b4922693db254331ac640a5c56ee7cadf",
    "templateCredsSetupCompleted": true
  },
  "name": "InstaTest",
  "tags": [
    {
      "id": "8PlqXsDyqVlHJ7RC",
      "name": "AI",
      "createdAt": "2024-07-10T14:12:10.657Z",
      "updatedAt": "2024-07-10T14:12:10.657Z"
    }
  ],
  "nodes": [
    {
      "id": "51dcaa84-d1f9-4abc-aebc-24a06801e42d",
      "name": "Set your system promt for AI",
      "type": "n8n-nodes-base.set",
      "notes": "In this node in \"prompt\" variable you can set your system prompt",
      "position": [
        1120,
        620
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "0b3c3d71-5627-4b8c-91f0-ac44eaedf196",
              "name": "prompt",
              "type": "string",
              "value": "=Persona: You are a instagram influencer.\nContext: You receive a messages from your subscribers\nTask: Answer questions in your writing style and patterns according to your previous posts text. Use your post only for style and patterns reference.\nStyle rules:\nsimple answers"
            },
            {
              "id": "c2a9e272-5c0d-4685-ad0e-ce6995f92a1c",
              "name": "sessionId",
              "type": "string",
              "value": "={{ $json.body.session_id }}"
            },
            {
              "id": "b3c20ee3-07a1-4584-b0d9-7310a2c6b723",
              "name": "chatInput",
              "type": "string",
              "value": "={{ $json.body.text }}"
            }
          ]
        }
      },
      "typeVersion": 3.3
    },
    {
      "id": "0fb36573-d632-4403-8809-3973f9caa32a",
      "name": "Local n8n memory",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "position": [
        1500,
        780
      ],
      "parameters": {
        "sessionKey": "={{ $('Set your system promt for AI').last().json.sessi...

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: Timeout Configuration

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        260,
        210
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "Fetch new followers",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        460,
        210
      ],
      "parameters": {
        "url": "https://api.twitter.com/2/users/{YOUR_USER_ID}/followers?user.fields=profile_image_url&max_results=3",
        "options": {},
        "authentication": "headerAuth"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id": "2",
          "name": "Twitter Token"
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Item Lists",
      "type": "n8n-nodes-base.itemLists",
      "position": [
        660,
        210
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "data"
      },
      "typeVersion": 1
    },
    {
      "name": "Function",
      "type": "n8n-nodes-base.function",
      "position": [
        1660,
        210
      ],
      "parameters": {
        "functionCode": "const binary = {};\nfor (let i=0; i < items.length; i++) {\n binary[`data${i}`] = items[i].binary.avatar;\n}\n\nreturn [\n {\n json: {\n numIcons: items.length,\n },\n binary,\n }\n];\n"
      },
      "typeVersion": 1
    },
    {
      "name": "Merge",
      "type": "n8n-nodes-base.merge",
      "position": [
        1910,
        110
      ],
      "parameters": {
        "mode": "mergeByIndex"
      },
      "typeVersion": 1
    },
    {
      "name": "Fetching images",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        860,
        210
      ],
      "parameters": {
        "url": "={{$json[\"profile_image_url\"].replace('normal','400x400')}}",
        "options": {},
        "responseFormat": "file",
        "dataPropertyName": "avatar"
      },
      "typeVersion": 1
    },
    {
      "name": "Fetch bg",
      "type...

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": "H7porcmXYj7StO23",
  "meta": {
    "instanceId": "35409808e3cc9dd8ecfa6f7b93ae931f074920a2f681e667da8974c0ecf81c52",
    "templateId": "2537",
    "templateCredsSetupCompleted": true
  },
  "name": "Generate Instagram Content from Top Trends with AI Image Generation",
  "tags": [],
  "nodes": [
    {
      "id": "8c49be2b-6320-4eb0-8303-6448ced34636",
      "name": "If media status is finished",
      "type": "n8n-nodes-base.if",
      "position": [
        1420,
        260
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "0304efee-33b2-499e-bad1-9238c1fc2999",
              "operator": {
                "name": "filter.operator.equals",
                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $json.status_code }}",
              "rightValue": "FINISHED"
            }
          ]
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "f0cc0be5-6d35-4334-a124-139fa8676d07",
      "name": "If media status is finished1",
      "type": "n8n-nodes-base.if",
      "position": [
        2000,
        260
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "0304efee-33b2-499e-bad1-9238c1fc2999",
              "operator": {
                "name": "filter.operator.equals",
                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $json.status_code }}",
              "r...

Output:
The node 'Telegram1' 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 'Telegram1'.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "FunctionItem",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        450,
        300
      ],
      "parameters": {
        "functionCode": "// hashtag list\nconst Hashtags = [\n \"#techtwitter\",\n \"#n8n\"\n];\n\n// random output function\nconst randomHashtag = Hashtags[Math.floor(Math.random() * Hashtags.length)];\nitem.hashtag = randomHashtag;\nreturn item;"
      },
      "typeVersion": 1
    },
    {
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        650,
        300
      ],
      "parameters": {
        "url": "https://api.openai.com/v1/engines/text-davinci-001/completions",
        "options": {},
        "requestMethod": "POST",
        "authentication": "headerAuth",
        "jsonParameters": true,
        "bodyParametersJson": "={\n \"prompt\": \"Generate a tweet, with under 100 characters, about and including the hashtag {{$node[\"FunctionItem\"].json[\"hashtag\"]}}:\",\n \"temperature\": 0.7,\n \"max_tokens\": 64,\n \"top_p\": 1,\n \"frequency_penalty\": 0,\n \"presence_penalty\": 0\n}"
      },
      "typeVersion": 1
    },
    {
      "name": "Airtable",
      "type": "n8n-nodes-base.airtable",
      "position": [
        1050,
        300
      ],
      "parameters": {
        "table": "main",
        "options": {},
        "operation": "append",
        "application": "appOaG8kEA8FAABOr"
      },
      "credentials": {
        "airtableApi": ""
      },
      "typeVersion": 1
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        850,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "Hashtag",
              "value": "={{$node[\"Function...

Output:
The node 'HTTP Request' (type: n8n-nodes-base.httpRequest) requires credentials but the 'credentials' configuration is missing.

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "httpHeaderAuth": ""
}
```

**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 'HTTP Request' node.