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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-8aa9be41",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.297056",
    "updatedAt": "2025-09-29T07:07:48.297078",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "a3af309b-d24c-42fe-8bcd-f330927c7a3c",
      "name": "Local File Trigger",
      "type": "n8n-nodes-base.localFileTrigger",
      "position": [
        140,
        260
      ],
      "parameters": {
        "path": "/home/node/storynotes/context",
        "events": [
          "add"
        ],
        "options": {
          "usePolling": true,
          "followSymlinks": true
        },
        "triggerOn": "folder"
      },
      "typeVersion": 1,
      "notes": "This localFileTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "048f9d67-6519-4dea-97df-aaddfefbfea2",
      "name": "Default Data Loader",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1300,
        720
      ],
      "parameters": {
        "options": {
          "metadata": {
            "metadataValues": [
              {
                "name": "project",
                "value": "={{ $('Settings').item.json.project }}"
              },
              {
                "name": "filename",
                "value": "={{ $('Settings').item.json.filename }}"
              }
            ]
          }
        },
        "jsonData": "={{ $json.data }}",
        "jsonMode": "expressionData"
      },
      "typeVersion": 1,
      "notes": "This documentDefaultDataLoader node performs automated tasks as part of the workflow."
    },
    {
      "id": "9e9047c9-4428-4afb-8c74-d6eb1075a65a",
      "name": "Recursive Character Text Splitter",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1300,
        860
      ],
      "parameters": {
        "options": {},
        "chunkSize"...

Output:
In node 'Get Doc Types', the parameter 'jsonOutput' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json["non_existent_field"] }}`
**Original Value**: `{
  "docs": [
    {
      "filename": "study_guide.md",
      "title": "Study Guide",
      "description": "A Study Guide is a consolidated resource designed to aid learning. This guide includes three key elements: * A short answer quiz accompanied by an answer key to test comprehension. * A curated list of long-form essay questions to encourage deeper analysis and synthesis of the material. * A glossary of key terms to reinforce understanding of important concepts."
    },
    {
      "filename": "timeline.md",
      "title": "Timeline",
      "description": "A Timeline organizes all significant events described in the sources you have uploaded in chronological order. This ordered list makes it easier to understand the sequence of events and their connection to the broader context of your sources. In addition to the list of events, the Timeline also provides a “cast of characters,” which comprises short biographical sketches of all the important people mentioned in your uploaded sources. These short biographies can help you quickly grasp the roles of various individuals involved in the events described by the Timeline."
    },
    {
      "filename": "briefing_doc.md",
      "title": "Briefing Doc",
      "description": "A Briefing Doc identifies and presents the most important facts and insights from the sources in an easy-to-understand outline format. This format is designed to provide a concise overview of the key takeaways from the uploaded materials."
    }
  ]
}
`

**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 'Get Doc Types' parameter 'jsonOutput'.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-6369b171",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.326370",
    "updatedAt": "2025-09-29T07:07:48.326383",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "a3af309b-d24c-42fe-8bcd-f330927c7a3c",
      "name": "Local File Trigger",
      "type": "n8n-nodes-base.localFileTrigger",
      "position": [
        140,
        260
      ],
      "parameters": {
        "path": "/home/node/storynotes/context",
        "events": [
          "add"
        ],
        "options": {
          "usePolling": true,
          "followSymlinks": true
        },
        "triggerOn": "folder"
      },
      "typeVersion": 1,
      "notes": "This localFileTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "048f9d67-6519-4dea-97df-aaddfefbfea2",
      "name": "Default Data Loader",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1300,
        720
      ],
      "parameters": {
        "options": {
          "metadata": {
            "metadataValues": [
              {
                "name": "project",
                "value": "={{ $('Settings').item.json.project }}"
              },
              {
                "name": "filename",
                "value": "={{ $('Settings').item.json.filename }}"
              }
            ]
          }
        },
        "jsonData": "={{ $json.data }}",
        "jsonMode": "expressionData"
      },
      "typeVersion": 1,
      "notes": "This documentDefaultDataLoader node performs automated tasks as part of the workflow."
    },
    {
      "id": "9e9047c9-4428-4afb-8c74-d6eb1075a65a",
      "name": "Recursive Character Text Splitter",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1300,
        860
      ],
      "parameters": {
        "options": {},
        "chunkSize"...

Output:
The node 'Interview' 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 'Interview'.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-d70e21e5",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.345324",
    "updatedAt": "2025-09-29T07:07:48.345443",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "bebbf9cf-8103-4694-a3be-ae3ee1e9ebaf",
      "name": "Watch For Bank Statements",
      "type": "n8n-nodes-base.localFileTrigger",
      "position": [
        780,
        400
      ],
      "parameters": {
        "path": "/home/node/host_mount/reconciliation_project",
        "events": [
          "add"
        ],
        "options": {
          "ignored": "!**/*.csv"
        },
        "triggerOn": "folder"
      },
      "typeVersion": 1,
      "notes": "This localFileTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "eca26bed-ba44-4507-97d4-9154e26908a5",
      "name": "Get Tenant Details",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1660,
        540
      ],
      "parameters": {
        "name": "get_tenant_details",
        "jsCode": "const xlsx = require('xlsx');\n\nconst { spreadsheet_location } = $('Set Variables').item.json;\nconst sheetName = 'tenants';\n\nconst wb = xlsx.readFile(spreadsheet_location, { sheets: [sheetName] });\nconst rows = xlsx.utils.sheet_to_json(wb.Sheets[sheetName], { raw: false });\n\nconst queryToList = [].concat(typeof query === 'string' ? query.split(',') : query);\n\nconst result = queryToList.map(q => (\n rows.find(row =>\n row['Tenant Name'].toLowerCase() === q.toLowerCase()\n || row['Tenant ID'].toLowerCase() === q.toString().toLowerCase()\n )\n));\n\nreturn result ? JSON.stringify(result) : `No results were found for ${query}`;",
        "description": "Call this tool to get a tenant's details which includes their tenancy terms, rent amount and any notes attached to their account. Pass in one or an array ...

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

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

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

**Solutions**:

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

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

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

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

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

Configure appropriate timeouts and error handling for HTTP requests.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "trigger-5800ea01",
      "name": "Manual Trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        100,
        100
      ],
      "parameters": {}
    },
    {
      "name": "Airtable",
      "type": "n8n-nodes-base.airtable",
      "position": [
        470,
        200
      ],
      "parameters": {
        "table": "Table 1",
        "operation": "list",
        "additionalOptions": {}
      },
      "credentials": {
        "airtableApi": ""
      },
      "typeVersion": 1,
      "id": "8d835b69-b8e2-4998-9002-6bd794592b46",
      "notes": "This airtable node performs automated tasks as part of the workflow."
    },
    {
      "name": "Mailcheck",
      "type": "n8n-nodes-base.mailcheck",
      "position": [
        670,
        200
      ],
      "parameters": {
        "email": "={{ $json[\"non_existent_field\"] }}"
      },
      "credentials": {
        "mailcheckApi": "Mailcheck API Credentials"
      },
      "typeVersion": 1,
      "id": "b5a4b510-6adf-4776-a6bc-e525ed90873b",
      "notes": "This mailcheck node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        870,
        200
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "ID",
              "value": "={{$node[\"Airtable\"].json[\"id\"]}}"
            }
          ],
          "boolean": [
            {
              "name": "Valid",
              "value": "={{$json[\"mxExists\"]}}"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1,
      "id": "3e051a21-24d9-4252-8ea9-4694e4d7d6af",
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "name": "Airtable1",
      "type": "n8n-nodes-base.airtable",
      "position": [
        1070,
        200
     ...

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

**Faulty Expression**: `={{ $json["non_existent_field"] }}`
**Original Value**: `={{$json["fields"]["Email"]}}`

**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 'Mailcheck' parameter 'email'.


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": "1",
  "name": "Create entry in Mailchimp from Airtable",
  "nodes": [
    {
      "name": "Cron",
      "type": "n8n-nodes-base.cron",
      "position": [
        450,
        450
      ],
      "parameters": {
        "triggerTimes": {
          "item": [
            {}
          ]
        }
      },
      "typeVersion": 1,
      "id": "c61085a4-4a65-4d2d-8333-aa641656a759",
      "notes": "This cron node performs automated tasks as part of the workflow."
    },
    {
      "name": "Airtable",
      "type": "n8n-nodes-base.airtable",
      "position": [
        650,
        450
      ],
      "parameters": {
        "table": "Users",
        "operation": "list",
        "application": "=apprZs8g4tIGDUtqQ",
        "additionalOptions": {
          "fields": [
            "Name",
            "Email",
            "Interest"
          ]
        }
      },
      "credentials": {
        "airtableApi": "claudiajanebates@gmail.com"
      },
      "typeVersion": 1,
      "id": "5884d116-03e8-4e38-b6ce-c94df07cb2cd",
      "notes": "This airtable node performs automated tasks as part of the workflow."
    },
    {
      "name": "Mailchimp",
      "type": "n8n-nodes-base.mailchimp",
      "position": [
        840,
        450
      ],
      "parameters": {
        "list": "777b2643d4",
        "email": "={{$node[\"Airtable\"].json[\"fields\"][\"Email\"]}}",
        "status": "subscribed",
        "options": {
          "tags": "Interest"
        },
        "mergeFieldsUi": {
          "mergeFieldsValues": [
            {
              "name": "FNAME",
              "value": "={{$node[\"Airtable\"].json[\"fields\"][\"Name\"]}}"
            }
          ]
        }
      },
      "credentials": {
        "mailchimpApi": "claudiajanebates@gmail.com"
      },
      "typeVersion": 1,
      "id": "1f5fe389-606d-4841-a057-fb9671fa3feb",
      "notes": "This mailchimp node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-6d040ae3",
      ...

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:
{
  "nodes": [
    {
      "name": "Mailchimp Trigger",
      "type": "n8n-nodes-base.mailchimpTrigger",
      "position": [
        870,
        370
      ],
      "parameters": {
        "list": "0a5a4ca5de",
        "events": [
          "subscribe"
        ],
        "sources": [
          "api",
          "admin",
          "user"
        ]
      },
      "credentials": {
        "mailchimpApi": "mailchimp_creds"
      },
      "typeVersion": 1,
      "id": "83679c47-1393-4c7e-8108-7607d8f2bd8e",
      "notes": "This mailchimpTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-41d2f36b",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {},
        "_injected_number_field": "not_a_number"
      }
    }
  ],
  "connections": {},
  "name": "Mailchimptrigger Workflow",
  "description": "Automated workflow: Mailchimptrigger Workflow. This workflow processes data and performs automated tasks.",
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "meta": {
    "instanceId": "workflow-01f5ba10",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.357434",
    "updatedAt": "2025-09-29T07:07:48.357457",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "notes": "Excellent quality workflow: Mailchimptrigger Workflow. This workflow has been optimized for production...

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

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'Error Handler'.


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "06v55r6E13Wfvo66"
  "meta": {
    "instanceId": "workflow-9e8c0e46",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.397543",
    "updatedAt": "2025-09-29T07:07:48.400956",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Gumroad sale trigger",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "789f1dec-d2d2-4e09-9530-719d354d259c",
      "name": "Assign to group",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        140,
        -280
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "method": "POST",
        "options": {},
        "authentication": "{{ $credentials.predefinedCredentialType }}",
        "nodeCredentialType": "YOUR_CREDENTIAL_HERE"
      },
      "credentials": {
        "mailerLiteApi": {
          "id": "i9V49FSxbwJhAGfI",
          "name": "Mailer Lite account"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "53c0df02-5571-485c-91ce-6be2f62fd6d6",
      "name": "Gumroad Sale Trigger",
      "type": "n8n-nodes-base.gumroadTrigger",
      "position": [
        -520,
        -280
      ],
      "webhookId": "06a01b99-cbf1-4694-8502-94ac51670ba4",
      "parameters": {
        "resource": "sale"
      },
      "credentials": {
        "gumroadApi": {
          "id": "wgjGSvLjsRBJImsQ",
          "name": "Gumroad account"
        }
      },
      "typeVersion": 1,
      "notes": "This gumroadTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "ee782134-e2d4-4f8b-a9d9-a09a919577ab",
      "name": "append row in CRM",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        480,
        -280
      ],
      "parameters...

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

Add the missing comma between object properties.


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

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

Workflow JSON:
{
  "id": "pkw1vY5q1p2nNfNC",
  "meta": {
    "instanceId": "workflow-e7b76011",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.378664",
    "updatedAt": "2025-09-29T07:07:48.378674",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Forward Netflix emails to multiple email addresses with GMail and Mailjet",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "653e1069-b231-41e4-8257-5276934ec124",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        600,
        360
      ],
      "parameters": {
        "simple": false,
        "filters": {
          "sender": "netflix.com",
          "includeSpamTrash": true
        },
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "rbqlV0L0SJmc5Qr6",
          "name": "Gmail account"
        }
      },
      "typeVersion": 1,
      "notes": "This gmailTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "2edc2a63-b3ce-45a4-ad37-fde991453be5",
      "name": "Mailjet",
      "type": "n8n-nodes-base.mailjet",
      "position": [
        1540,
        360
      ],
      "parameters": {
        "html": "={{ $json.html }}",
        "text": "={{ $json.text }}",
        "subject": "={{ $json.subject }}",
        "toEmail": "={{ $json.recipient }}",
        "fromEmail": "sender@email.com",
        "additionalFields": {}
      },
      "credentials": {
        "mailjetEmailApi": {
          "id": "ToQvJxEpa4shhXkA",
          "name": "Mailjet Email account"
        }
      },
      "typeVersion": 1,
      "notes": "This mailjet node performs automated tasks as ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "0wfomsVO0TQtQkwU",
  "meta": {
    "instanceId": "workflow-31fa79e6",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.410177",
    "updatedAt": "2025-09-29T07:07:48.410188",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Complete Guide to Setting Up and Generating TOTP Codes in n8n \ud83d\udd10",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "0fe95b9a-be2b-4022-829e-8b6c801e5baf",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -280,
        -340
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "02fee6b5-7770-4889-b9bb-89bface8872d",
      "name": "TOTP",
      "type": "n8n-nodes-base.totp",
      "position": [
        -40,
        -340
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "totpApi": {
          "id": "9487Zco8UqMQWnpf",
          "name": "TOTP account Mars55"
        }
      },
      "typeVersion": 1,
      "notes": "This totp node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-4173258e",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "pinData": {},
  "settings": {
    "timezone": "UTC",
    "callerPolicy": "workflowsFromSameOwner",
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "errorWorkflow": null,
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": 1003,
  "name": "New tweets",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        260
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "caf9ec35-025e-4fb2-870d-dee5cf008ac1",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Twitter",
      "type": "n8n-nodes-base.twitter",
      "position": [
        520,
        160
      ],
      "parameters": {
        "limit": 100,
        "operation": "search",
        "searchText": "verstappen",
        "additionalFields": {
          "resultType": "mixed"
        }
      },
      "typeVersion": 1,
      "id": "b521570d-2b73-480d-964c-719fa1b22fa0",
      "notes": "This twitter node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set_AT_list",
      "type": "n8n-nodes-base.set",
      "position": [
        780,
        360
      ],
      "parameters": {
        "values": {
          "number": [
            {
              "name": "Likes",
              "value": "={{$node[\"Twitter\"].json[\"favorite_count\"] ? $node[\"Twitter\"].json[\"favorite_count\"] : 0 }}"
            }
          ],
          "string": [
            {
              "name": "Tweet",
              "value": "={{$node[\"get airtable list\"].json[\"fields\"][\"Tweet\"]}}"
            },
            {
              "name": "Tweet_id",
              "value": "={{$node[\"get airtable list\"].json[\"fields\"][\"Tweet_id\"]}}"
            },
            {
              "name": "Tweet URL",
              "value": "={{$node[\"get airtable list\"].json[\"fields\"][\"Tweet URL\"]}}"
            },
            {
              "name": "Author",
              "value": "={{$node[\"get airtable list\"].json[\"fields\"][\"Author\"]}}"
            },
            {
              "name": "Time",
              "value": "={{$node[\"get airtable list\"].json[\"...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "100",
  "name": "Create a new task in Todoist",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        550,
        250
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "3748f926-9327-4239-a325-87d408827262",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Todoist",
      "type": "n8n-nodes-base.todoist",
      "position": [
        750,
        250
      ],
      "parameters": {
        "content": "",
        "options": {}
      },
      "credentials": {
        "todoistApi": ""
      },
      "typeVersion": 1,
      "id": "5972b3d2-1633-4efc-9626-fed5237fe2d0",
      "notes": "This todoist node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-f6e3b166",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create a new task in Todoist. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-b062ffa2",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.422706",
    "updatedAt": "2025-09-29T07:07:48.422730",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "tags": [
    "automation",
    "n8n",
    "produ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        320
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "7fef6b02-2917-4237-b27b-8610855e63c0",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Copper",
      "type": "n8n-nodes-base.copper",
      "position": [
        450,
        320
      ],
      "parameters": {
        "name": "Harshil",
        "resource": "person",
        "additionalFields": {
          "emails": {
            "emailFields": [
              {
                "email": "harshil@n8n.io",
                "category": "work"
              }
            ]
          }
        }
      },
      "credentials": {
        "copperApi": "Copper API Credentials"
      },
      "typeVersion": 1,
      "id": "e4a4fcad-4ff4-4084-b000-d3dcd2a5f429",
      "notes": "This copper node performs automated tasks as part of the workflow."
    },
    {
      "name": "Copper1",
      "type": "n8n-nodes-base.copper",
      "position": [
        650,
        320
      ],
      "parameters": {
        "personId": "={{$json[\"id\"]}}",
        "resource": "person",
        "operation": "update",
        "updateFields": {
          "phone_numbers": {
            "phoneFields": [
              {
                "number": "1234567890",
                "category": "work"
              }
            ]
          }
        }
      },
      "credentials": {
        "copperApi": "Copper API Credentials"
      },
      "typeVersion": 1,
      "id": "1fcc42e4-b190-4278-a7ef-7372e4df707f",
      "notes": "This copper node performs automated tasks as part of the workflow."
    },
    {
      "name": "Copper2",
      "type": "n8n-nodes-base.copper",
      "position": [
        850,
        320
      ],
      "parameters": {
        "personId": "={{$json[\"id\"]}}",
        "resource": "person",
        "op...

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": "1028",
  "name": "Loading data into a spreadsheet",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        160,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "b6c9561b-3aea-456d-ba9e-4642db280282",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        650,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "Name",
              "value": "={{$json[\"properties\"][\"firstname\"][\"value\"]}} {{$json[\"properties\"][\"lastname\"][\"value\"]}}"
            },
            {
              "name": "Email",
              "value": "={{$json[\"identity-profiles\"][0][\"identities\"][0][\"value\"]}}"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true,
        "_injected_number_field": "not_a_number"
      },
      "typeVersion": 1,
      "id": "b50b6240-16ce-4e0d-ae24-07983d450b15",
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "name": "Mock data (CRM Contacts)",
      "type": "n8n-nodes-base.function",
      "notes": "\"Get contacts\" data from Hubspot node. ",
      "position": [
        400,
        300
      ],
      "parameters": {
        "functionCode": "var newItems = [];\nnewItems.push({json:{\n    \"addedAt\": 1606827045601,\n    \"vid\": 1,\n    \"canonical-vid\": 1,\n    \"merged-vids\": [],\n    \"portal-id\": 8924380,\n    \"is-contact\": true,\n    \"profile-token\": \"AO_T-mMZqmgHPI5CLLlw2qE24AlgWOJUL0LdMb2CegxeMzQK1LXyh7iZAgjNd-00ZdPAfnFU9Lv_7nq6qlrKvfAh8hr_cw-VBH1RCCMgHHYQ06DOXoIGAlViWmMKY-0lF9dv7lBVOMf5\",\n    \"profile-url\": \"{{ $env.WEBHOOK_URL }}\",\n    \"properties\": {\n      \"firstname\": {\n        \"value\": \"Maria\"\n      },\n     ...

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

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

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

**Solutions**:

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        280
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "dfd8847c-3803-4173-a5e9-70cf0e1c2361",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Slides",
      "type": "n8n-nodes-base.googleSlides",
      "position": [
        470,
        280
      ],
      "parameters": {
        "operation": "getSlides",
        "returnAll": true,
        "authentication": "{{ $credentials.oAuth2 }}",
        "presentationId": "11myCBTn3IT-Iww01WMz43L7HUmQdL6cCR6NCtpsZer0"
      },
      "credentials": {
        "googleSlidesOAuth2Api": "Google Slides Credentials"
      },
      "typeVersion": 1,
      "id": "4be2760a-3222-4da8-999a-b6ec1e891c12",
      "notes": "This googleSlides node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Slides1",
      "type": "n8n-nodes-base.googleSlides",
      "position": [
        670,
        280
      ],
      "parameters": {
        "download": true,
        "resource": "page",
        "operation": "getThumbnail",
        "pageObjectId": "={{$json[\"objectId\"]}}",
        "authentication": "{{ $credentials.oAuth2 }}",
        "presentationId": "={{$node[\"Google Slides\"].parameter[\"presentationId\"]}}"
      },
      "typeVersion": 1,
      "id": "2d8375f8-5f6e-4eac-bea8-21b0456474ad",
      "notes": "This googleSlides node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-b12724d5",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "connections": {},
  "name": "Manualtrigger Workflow",
  "description": "Automated workflo...

Output:
The node 'Google Slides1' (type: n8n-nodes-base.googleSlides) 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": {
  "googleSlidesOAuth2Api": "Google Slides Credentials"
}
```

**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 'Google Slides1' 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": "103:
  "name": "Create a new customer in Chargebee",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "00b94a02-24d2-490b-8f61-9197ccd13243",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Chargebee",
      "type": "n8n-nodes-base.chargebee",
      "position": [
        460,
        300
      ],
      "parameters": {
        "resource": "customer",
        "properties": {
          "last_name": "",
          "first_name": ""
        }
      },
      "credentials": {
        "chargebeeApi": ""
      },
      "typeVersion": 1,
      "id": "81f0d87d-b721-42fa-8052-c9ac7c2d3453",
      "notes": "This chargebee node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-b4c15f56",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Create a new customer in Chargebee. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-87f79e62",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.440345",
    "updatedAt": "2025-09-29T07:07:48.440372",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "h...

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

Add the missing closing quote to complete the string.


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

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

Workflow JSON:
{
  "id" "103",
  "name": "verify email",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        440,
        510
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "1281eaa3-fd45-426b-9d17-d7c560e962bb",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create Email Item",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        640,
        510
      ],
      "parameters": {
        "functionCode": "item.email = \"mcolomer@gmail.com\";\nreturn item;"
      },
      "typeVersion": 1,
      "id": "9659c568-7d05-47b7-983b-1a61ad49fb04",
      "notes": "This functionItem node performs automated tasks as part of the workflow."
    },
    {
      "name": "Check Email Exists",
      "type": "n8n-nodes-base.uproc",
      "position": [
        850,
        510
      ],
      "parameters": {
        "tool": "checkEmailExists",
        "email": "={{$node[\"Create Email Item\"].json[\"email\"]}}",
        "additionalOptions": {}
      },
      "credentials": {
        "uprocApi": "miquel-uproc"
      },
      "typeVersion": 1,
      "id": "4b80e0d0-504c-401e-9cd2-aa5163e0a91d",
      "notes": "This uproc node performs automated tasks as part of the workflow."
    },
    {
      "name": "Email Exists?",
      "type": "n8n-nodes-base.if",
      "position": [
        1050,
        510
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{$node[\"Check Email Exists\"].json[\"message\"][\"response\"]}}",
              "value2": "deliverable"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "cae285c7-a532-47bc-ad05-80a5513ac715",
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-6ae7be9d",
      "name": "Error Handler",
      "type": "n8n-nodes-base...

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

Add the missing colon after the property name.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        200
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "aa28d85f-0b17-4466-9376-c70814817d7d",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Webflow",
      "type": "n8n-nodes-base.webflow",
      "position": [
        450,
        200
      ],
      "parameters": {
        "siteId": "601788abebf7aa35c1b038a1",
        "fieldsUi": {
          "fieldValues": [
            {
              "fieldId": "name",
              "fieldValue": "n8n"
            },
            {
              "fieldId": "slug",
              "fieldValue": "n8n"
            },
            {
              "fieldId": "_archived",
              "fieldValue": "false"
            },
            {
              "fieldId": "_draft",
              "fieldValue": "false"
            }
          ]
        },
        "operation": "create",
        "collectionId": "601788ab33a62ac6a2a0284c"
      },
      "credentials": {
        "webflowApi": "Webflow Credentials"
      },
      "typeVersion": 1,
      "id": "82b78c92-d590-4036-a2c6-d4270944913a",
      "notes": "This webflow node performs automated tasks as part of the workflow."
    },
    {
      "name": "Webflow2",
      "type": "n8n-nodes-base.webflow",
      "position": [
        650,
        200
      ],
      "parameters": {
        "itemId": "={{$json[\"_id\"]}}",
        "siteId": "601788abebf7aa35c1b038a1",
        "fieldsUi": {
          "fieldValues": [
            {
              "fieldId": "name",
              "fieldValue": "={{$json[\"name\"]}}"
            },
            {
              "fieldId": "slug",
              "fieldValue": "={{$json[\"slug\"]}}"
            },
            {
              "fieldId": "_archived",
              "fieldValue": "={{$json[\"_archived\"]}}"
            },
            {
 ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "104",
  "name": "Look up a person using their email in Clearbit",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "546e1cbd-4da1-4c66-893e-88b24237537e",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Clearbit",
      "type": "n8n-nodes-base.clearbit",
      "position": [
        450,
        300
      ],
      "parameters": {
        "email": "",
        "resource": "person",
        "additionalFields": {}
      },
      "credentials": {
        "clearbitApi": ""
      },
      "typeVersion": 1,
      "id": "fb1cc73e-b994-459a-af42-dd5af9b3e203",
      "notes": "This clearbit node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-305eb18b",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Look up a person using their email in Clearbit. This workflow processes data and performs automated tasks.",
  "meta": {
    "instanceId": "workflow-eb290aa8",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.472837",
    "updatedAt": "2025-09-29T07:07:48.472864",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "enviro...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "104",
  "name": "location_by_ip",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        440,
        510
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "f9e043a0-c800-458b-9b1b-77b9bdf40a02",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Get Location By IP",
      "type": "n8n-nodes-base.uproc",
      "position": [
        850,
        510
      ],
      "parameters": {
        "ip": "={{$node[\"Create IP and Email Item\"].json[\"ip\"]}}",
        "tool": "getLocationByIp",
        "group": "geographic",
        "additionalOptions": {}
      },
      "credentials": {
        "uprocApi": "miquel-uproc"
      },
      "typeVersion": 1,
      "id": "c936eca1-6f7e-4132-af5d-7829b0616205",
      "notes": "This uproc node performs automated tasks as part of the workflow."
    },
    {
      "name": "User in Spain?",
      "type": "n8n-nodes-base.if",
      "position": [
        1050,
        510
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{$node[\"Get Location By IP\"].json[\"message\"][\"country_code\"]}}",
              "value2": "ES"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "2cfddaf5-eb79-4820-91c0-a5aea49e34da",
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create IP and Email Item",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        640,
        510
      ],
      "parameters": {
        "functionCode": "item.ip = \"83.46.131.46\";\nitem.email = \"miquel@uproc.io\";\n\nreturn item;"
      },
      "typeVersion": 1,
      "id": "fd136836-2c01-487b-ac4c-dc10cdf6180c",
      "notes": "This functionItem node performs automated tasks as part of the workflow."
    },
    {
      "name": "Send Engli...

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

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

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

**Solutions**:

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

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

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

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

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

Add rate limiting protection with Wait nodes and retry logic.


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

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

Workflow JSON:
{
  "id": "105",
  "name": "Create a new member, update the information of the member, create a note and a post for the membe...",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "642b39d1-73ab-4abb-b55f-e711f76fe5fd",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Orbit",
      "type": "n8n-nodes-base.orbit",
      "position": [
        450,
        300
      ],
      "parameters": {
        "operation": "upsert",
        "identityUi": {
          "identityValue": {
            "source": "github",
            "searchBy": "username",
            "username": ""
          }
        },
        "workspaceId": "425",
        "additionalFields": {}
      },
      "credentials": {
        "orbitApi": "orbit-review"
      },
      "typeVersion": 1,
      "id": "ad12aecc-ab5a-423b-a165-1b586eba5547",
      "notes": "This orbit node performs automated tasks as part of the workflow."
    },
    {
      "name": "Orbit1",
      "type": "n8n-nodes-base.orbit",
      "position": [
        650,
        300
      ],
      "parameters": {
        "memberId": "={{$node[\"Orbit\"].json[\"id\"]}}",
        "operation": "update",
        "workspaceId": "={{$node[\"Orbit\"].parameter[\"workspaceId\"]}}",
        "updateFields": {
          "tagsToAdd": ""
        }
      },
      "credentials": {
        "orbitApi": "orbit-review"
      },
      "typeVersion": 1,
      "id": "40d6bb90-836d-4af9-a8df-eede0e6fecf8",
      "notes": "This orbit node performs automated tasks as part of the workflow."
    },
    {
      "name": "Orbit2",
      "type": "n8n-nodes-base.orbit",
      "position": [
        850,
        300
      ],
      "parameters": {
        "note": "",
        "memberId": "={{$node[\"Orbit\"].json[\"id\"]}}",
        "resource": "note",
   ...

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: 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": "107",
  "name": "Get a volume and add it to your bookshelf",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        260,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "b8c24415-a6f8-42ae-9105-8e2d15e8061f",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Books",
      "type": "n8n-nodes-base.googleBooks",
      "position": [
        460,
        300
      ],
      "parameters": {
        "resource": "volume",
        "volumeId": "XxUJ2U2FXtYC",
        "authentication": "{{ $credentials.oAuth2 }}"
      },
      "credentials": {
        "googleBooksOAuth2Api": "google-books"
      },
      "typeVersion": 1,
      "id": "bea109b1-cd7a-4a9c-a71a-76dabeeae875",
      "notes": "This googleBooks node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Books1",
      "type": "n8n-nodes-base.googleBooks",
      "position": [
        660,
        300
      ],
      "parameters": {
        "shelfId": "2",
        "resource": "bookshelfVolume",
        "volumeId": "={{$node[\"Google Books\"].json[\"id\"]}}",
        "operation": "add",
        "authentication": "{{ $credentials.oAuth2 }}"
      },
      "credentials": {
        "googleBooksOAuth2Api": "google-books"
      },
      "typeVersion": 1,
      "id": "ac645069-c205-4d8e-adf4-a590177fe1e0",
      "notes": "This googleBooks node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Books2",
      "type": "n8n-nodes-base.googleBooks",
      "position": [
        860,
        300
      ],
      "parameters": {
        "shelfId": "={{$node[\"Google Books1\"].parameter[\"shelfId\"]}}",
        "resource": "bookshelfVolume",
        "myLibrary": true,
        "authentication": "{{ $credentials.oAuth2 }}"
      },
      "credentials": {
        "googleBooksOAuth...

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

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        350,
        200
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "ed3cd78f-1538-4d22-9cf9-1fd0aaca3f41",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "iCalendar",
      "type": "n8n-nodes-base.iCal",
      "position": [
        550,
        200
      ],
      "parameters": {
        "end": "2021-06-11T16:15:00.000Z",
        "start": "2021-06-11T15:30:00.000Z",
        "title": "n8n Community Meetup",
        "additionalFields": {}
      },
      "typeVersion": 1,
      "id": "508c294e-d9a0-45d4-b8c8-a8527e9d1bb4",
      "notes": "This iCal node performs automated tasks as part of the workflow."
    },
    {
      "name": "Send Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        750,
        200
      ],
      "parameters": {
        "text": "Hey Harshil,\n\nWe are excited to invite you to the n8n community meetup!\n\nWith this email you will find the invite attached.\n\nLooking forward to seeing you at the meetup!\n\nCheers,\nHarshil",
        "options": {},
        "subject": "n8n Community Meetup \ud83d\ude80",
        "attachments": "data"
      },
      "credentials": {
        "smtp": "Outlook Burner Credentials"
      },
      "typeVersion": 1,
      "id": "6e8d176a-ef80-4b04-9f28-8f6cb238e156",
      "notes": "This emailSend node performs automated tasks as part of the workflow."
    },
    {
      "parameters": {
        "url": "https://api.example.com/data",
        "method": "GET",
        "options": {}
      },
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        450,
        300
      ]
    }
  ],
  "connections": {
    "6e8d176a-ef80-4b04-9f28-8f6cb238e156": {
      "main": [
        [
          {
            "node": "error-handler-6e8d176a-ef80-4b04-9f28...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "110",
  "name": "Get SSL Certificate",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        290
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "ccc61507-0e95-4644-a1c2-dd6aadfdd836",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create Domain Item",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        450,
        290
      ],
      "parameters": {
        "functionCode": "item.domain = \"n8n.io\";\nreturn item;"
      },
      "typeVersion": 1,
      "id": "733aa9dd-d792-45b8-bfcf-496476a59875",
      "notes": "This functionItem node performs automated tasks as part of the workflow."
    },
    {
      "name": "Get SSL Certificate",
      "type": "n8n-nodes-base.uproc",
      "position": [
        650,
        290
      ],
      "parameters": {
        "tool": "={{ $env.UNDEFINED_ENV_VAR }}",
        "group": "internet",
        "domain": "= {{$node[\"Create Domain Item\"].json[\"domain\"]}}",
        "additionalOptions": {}
      },
      "credentials": {
        "uprocApi": "miquel-uproc"
      },
      "typeVersion": 1,
      "id": "8d1f370c-f77e-42b7-9132-451a3c3ff171",
      "notes": "This uproc node performs automated tasks as part of the workflow."
    },
    {
      "name": "Send Expired Alarm",
      "type": "n8n-nodes-base.telegram",
      "position": [
        1070,
        270
      ],
      "parameters": {
        "text": "=The certificate of the domain {{$node[\"Create Domain Item\"].json[\"domain\"]}} has expired!",
        "chatId": "-1415703867",
        "additionalFields": {}
      },
      "credentials": {
        "telegramApi": "test killia bot"
      },
      "typeVersion": 1,
      "id": "8c82b84b-c365-43fc-9ae3-8b6bdd71636e",
      "notes": "This telegram node performs automated tasks as part of the workflow."
    },
    {
     ...

Output:
In node 'Get SSL Certificate', the parameter 'tool' contains an expression that references undefined data.

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

**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 'Get SSL Certificate' parameter 'tool'.


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": "110",
  "name": "Get all the stories starting with `release` and publish them",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "a3ef0def-5f34-49a2-aa39-39332c050bb5",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Storyblok",
      "type": "n8n-nodes-base.storyblok",
      "position": [
        450,
        300
      ],
      "parameters": {
        "space": 96940,
        "source": "managementApi",
        "filters": {
          "starts_with": "release"
        },
        "operation": "getAll"
      },
      "credentials": {
        "storyblokManagementApi": "storyblok-tanay"
      },
      "typeVersion": 1,
      "id": "88ad35f7-28f0-419d-b417-bb38ff28a282",
      "notes": "This storyblok node performs automated tasks as part of the workflow."
    },
    {
      "name": "Storyblok1",
      "type": "n8n-nodes-base.storyblok",
      "position": [
        650,
        300
      ],
      "parameters": {
        "space": "={{$node[\"Storyblok\"].parameter[\"space\"]}}",
        "source": "managementApi",
        "options": {},
        "storyId": "={{$node[\"Storyblok\"].json[\"id\"]}}",
        "operation": "publish"
      },
      "credentials": {
        "storyblokManagementApi": "storyblok-tanay"
      },
      "typeVersion": 1,
      "id": "1a764816-4e6a-4af3-bc2e-2c6581941b8b",
      "notes": "This storyblok node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-7601364b",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    },
    {
      "parameters": {
        "url": "https://ap...

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: Empty Input Handling

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        190,
        160
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "7da5baf1-4bfe-462f-bb7a-34d755499ae1",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "AWS Transcribe",
      "type": "n8n-nodes-base.awsTranscribe",
      "position": [
        590,
        160
      ],
      "parameters": {
        "options": {},
        "mediaFileUri": "=s3://{{$node[\"AWS S3\"].parameter[\"bucketName\"]}}/{{$json[\"Key\"]}}",
        "detectLanguage": true,
        "transcriptionJobName": "={{$json[\"Key\"].replace(/\\s/g,'-')}}"
      },
      "credentials": {
        "aws": "AWS Transcribe Credentials"
      },
      "typeVersion": 1,
      "id": "f8f8da27-9c34-4322-be32-0e7818b44f4f",
      "notes": "This awsTranscribe node performs automated tasks as part of the workflow."
    },
    {
      "name": "AWS S3",
      "type": "n8n-nodes-base.awsS3",
      "position": [
        390,
        160
      ],
      "parameters": {
        "options": {},
        "operation": "getAll",
        "returnAll": true,
        "bucketName": "n8n-docs"
      },
      "credentials": {
        "aws": "AWS S3 Credentials"
      },
      "typeVersion": 1,
      "id": "c6b14a2d-1b8d-4fb8-bfce-9f895d1c24c2",
      "notes": "This awsS3 node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-db860470",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "connections": {},
  "name": "Manualtrigger Workflow",
  "description": "Automated workflow: Manualtrigger Workflow. This workflow processes data and performs automated tasks.",
  "settings"...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        200
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "69870c95-f0d8-4744-b5b0-95091609fc72",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Microsoft To Do",
      "type": "n8n-nodes-base.microsoftToDo",
      "position": [
        450,
        200
      ],
      "parameters": {
        "title": "Document Microsoft To Do node",
        "operation": "={{ $env.UNDEFINED_ENV_VAR }}",
        "taskListId": "AQMkADAwATNiZmYAZC0zOTkAMy02ZWZjLTAwAi0wMAoALgAAA3i1fHMTrftIhQBzhywL64UBAFB0wRiJW1FJmmlvlAkVFQA-AAACARIAAAA=",
        "additionalFields": {
          "importance": "high"
        }
      },
      "credentials": {
        "microsoftToDoOAuth2Api": "Microsoft OAuth Credentials"
      },
      "typeVersion": 1,
      "id": "c4644e8a-0b31-4026-9e2e-523d96c963e8",
      "notes": "This microsoftToDo node performs automated tasks as part of the workflow."
    },
    {
      "name": "Microsoft To Do1",
      "type": "n8n-nodes-base.microsoftToDo",
      "position": [
        650,
        200
      ],
      "parameters": {
        "taskId": "={{$json[\"id\"]}}",
        "operation": "update",
        "taskListId": "={{$node[\"Microsoft To Do\"].parameter[\"taskListId\"]}}",
        "updateFields": {
          "status": "inProgress"
        }
      },
      "credentials": {
        "microsoftToDoOAuth2Api": "Microsoft OAuth Credentials"
      },
      "typeVersion": 1,
      "id": "1d88f04c-07e6-47b5-9f9f-e9f0577ff7fb",
      "notes": "This microsoftToDo node performs automated tasks as part of the workflow."
    },
    {
      "name": "Microsoft To Do2",
      "type": "n8n-nodes-base.microsoftToDo",
      "position": [
        850,
        200
      ],
      "parameters": {
        "taskId": "={{$json[\"id\"]}}",
        "taskListId": "={{$...

Output:
In node 'Microsoft To Do', the parameter 'operation' contains an expression that references undefined data.

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

**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 'Microsoft To Do' parameter 'operation'.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        230,
        320
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "912b4f51-23fd-4569-ba43-4b524745b05f",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Git",
      "type": "n8n-nodes-base.git",
      "position": [
        430,
        320
      ],
      "parameters": {
        "operation": "add",
        "pathsToAdd": "README.md"
      },
      "typeVersion": 1,
      "id": "2880a69c-1479-4c8f-8a95-d250b31bb804",
      "notes": "This git node performs automated tasks as part of the workflow."
    },
    {
      "name": "Git1",
      "type": "n8n-nodes-base.git",
      "position": [
        630,
        320
      ],
      "parameters": {
        "message": "\u2728 First commit from n8n",
        "options": {},
        "operation": "commit",
        "repositoryPath": "={{$node[\"Git\"].parameter[\"repositoryPath\"]}}"
      },
      "typeVersion": 1,
      "id": "75a45dd1-bd59-409a-a914-94f73359d6b3",
      "notes": "This git node performs automated tasks as part of the workflow."
    },
    {
      "name": "Git2",
      "type": "n8n-nodes-base.git",
      "position": [
        830,
        320
      ],
      "parameters": {
        "options": {},
        "repositoryPath": "={{$node[\"Git\"].parameter[\"repositoryPath\"]}}"
      },
      "typeVersion": 1,
      "id": "98cbdfb7-95ef-49b3-b93e-00bea13ab632",
      "notes": "This git node performs automated tasks as part of the workflow."
    },
    {
      "name": "Git3",
      "type": "n8n-nodes-base.git",
      "position": [
        1030,
        320
      ],
      "parameters": {
        "options": {},
        "operation": "push",
        "repositoryPath": "={{$node[\"Git\"].parameter[\"repositoryPath\"]}}"
      },
      "executeOnce": false,
      "typeVersion": 1,
      "id": "5731a853-3127...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": 111,
  "name": "Standup Bot - Initialize:
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "8dbd1bde-4500-4f89-9732-2eba32a08c14",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Write Binary File",
      "type": "n8n-nodes-base.writeBinaryFile",
      "position": [
        880,
        300
      ],
      "parameters": {
        "fileName": "/home/node/.n8n/standup-bot-config.json"
      },
      "typeVersion": 1,
      "id": "e60db6d2-3992-4133-9faa-b11f07decb5f",
      "notes": "This writeBinaryFile node performs automated tasks as part of the workflow."
    },
    {
      "name": "Move Binary Data",
      "type": "n8n-nodes-base.moveBinaryData",
      "position": [
        660,
        300
      ],
      "parameters": {
        "mode": "jsonToBinary",
        "options": {
          "encoding": "utf8",
          "fileName": "standup-bot-config.json"
        }
      },
      "typeVersion": 1,
      "id": "2e116fed-f65e-461b-80c9-f8da16db0b44",
      "notes": "This moveBinaryData node performs automated tasks as part of the workflow."
    },
    {
      "name": "Use Default Config",
      "type": "n8n-nodes-base.set",
      "position": [
        440,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "config.slashCmdToken",
              "value": "xxxxx"
            },
            {
              "name": "config.mattermostBaseUrl",
              "value": "{{ $env.WEBHOOK_URL }}"
            },
            {
              "name": "config.botUserToken",
              "value": "xxxxx"
            },
            {
              "name": "config.n8nWebhookUrl",
              "value": "{{ $env.WEBHOOK_URL }}"
            },
            {
              "name":...

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": "112",
  "name": "Get Company by Name",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        440,
        510
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "3357f15d-0a97-4aa4-a246-dc066ed6dd5a",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create Company Item",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        640,
        510
      ],
      "parameters": {
        "functionCode": "item.company = \"Killia technologies\";\nitem.country = \"Spain\";\n\nreturn item;"
      },
      "typeVersion": 1,
      "id": "2fba7abb-1883-47fe-908e-81a6cf8c019c",
      "notes": "This functionItem node performs automated tasks as part of the workflow."
    },
    {
      "name": "Get Company by Name",
      "type": "n8n-nodes-base.uproc",
      "position": [
        850,
        510
      ],
      "parameters": {
        "name": "={{$node[\"Create Company Item\"].json[\"company\"]}}",
        "tool": "getCompanyByName",
        "group": "company",
        "country": "={{$node[\"Create Company Item\"].json[\"country\"]}}",
        "additionalOptions": {}
      },
      "typeVersion": 1,
      "id": "daf3b36a-6924-407f-adde-b27c96299bb7",
      "notes": "This uproc node performs automated tasks as part of the workflow."
    },
    {
      "name": "Company Found?",
      "type": "n8n-nodes-base.if",
      "position": [
        1050,
        510
      ],
      "parameters": {
        "conditions": {
          "number": [],
          "string": [
            {
              "value1": "={{$node[\"Get Company by Name\"].json[\"message\"][\"name\"]}}",
              "value2": ".+",
              "operation": "regex"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "bced8528-be30-47e9-b66e-b8c6b65ac193",
      "notes": "This if node performs automated tas...

Output:
The node 'Get Company by Name' (type: n8n-nodes-base.uproc) 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": {
  "uprocApi": "miquel-uproc"
}
```

**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 Company by Name' 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": 112,
  "name": "Standup Bot - Read Config",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "0e9cd835-ae15-4b1b-b92b-bdc56e49b26c",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Read Config File",
      "type": "n8n-nodes-base.readBinaryFile",
      "position": [
        420,
        300
      ],
      "parameters": {
        "filePath": "/home/node/.n8n/standup-bot-config.json",
        "dataPropertyName": "config"
      },
      "typeVersion": 1,
      "id": "8cf8cf70-44f2-4be4-bf4c-d3448f552a35",
      "notes": "This readBinaryFile node performs automated tasks as part of the workflow."
    },
    {
      "name": "Convert to JSON",
      "type": "n8n-nodes-base.moveBinaryData",
      "position": [
        600,
        300
      ],
      "parameters": {
        "options": {
          "encoding": "utf8"
        },
        "sourceKey": "YOUR_CREDENTIAL_HERE"
      },
      "typeVersion": 1,
      "id": "5d00f808-fe73-49b8-b76e-92bf68df86aa",
      "notes": "This moveBinaryData node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-a6d6226c",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Standup ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "718cd201-1ae4-4c8c-a057-0013eb89f587",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "If Node",
      "type": "n8n-nodes-base.if",
      "position": [
        600,
        150
      ],
      "parameters": {
        "conditions": {
          "number": [
            {
              "value1": "={{$runIndex}}",
              "value2": 4
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "23ae4e6a-3681-4d3a-b190-338a20d86060",
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "name": "NoOp",
      "type": "n8n-nodes-base.noOp",
      "position": [
        750,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "b966b8b3-b039-4c5e-aafc-615c6d8d15fa",
      "notes": "This noOp node performs automated tasks as part of the workflow."
    },
    {
      "name": "Twitter",
      "type": "n8n-nodes-base.twitter",
      "position": [
        440,
        300
      ],
      "parameters": {
        "text": "Hello from n8n!",
        "additionalFields": {}
      },
      "credentials": {
        "twitterOAuth1Api": "Dummy Account"
      },
      "typeVersion": 1,
      "id": "3df5d23f-0864-4a1f-b4b5-fa03f2bbaed6",
      "notes": "This twitter node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-291725b3",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "connections": {},
  "name": "Manualtrigger Workflow",
  "description": "Automated work...

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: 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": "113",
  "name": "Get DNS entries",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        290
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "5235ea7a-5633-485f-a83c-9c95ce839d89",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create Domain Item",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        450,
        290
      ],
      "parameters": {
        "functionCode": "item.domain = \"n8n.io\";\nreturn item;"
      },
      "typeVersion": 1,
      "id": "3164b91a-c5bb-469e-b1fe-01be4e7dcc48",
      "notes": "This functionItem node performs automated tasks as part of the workflow."
    },
    {
      "name": "Get DNS records",
      "type": "n8n-nodes-base.uproc",
      "position": [
        650,
        290
      ],
      "parameters": {
        "tool": "getDomainRecords",
        "group": "internet",
        "domain": "= {{$node[\"Create Domain Item\"].json[\"domain\"]}}",
        "additionalOptions": {}
      },
      "typeVersion": 1,
      "id": "f6d27d55-8fb7-400b-868d-d787866189f3",
      "notes": "This uproc node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-4253b3fd",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "connections": {},
  "description": "Automated workflow: Get ...

Output:
The node 'Get DNS records' (type: n8n-nodes-base.uproc) 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": {
  "uprocApi": "miquel-uproc"
}
```

**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 DNS records' node.