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": "161",
  "name": "Create a table and insert data into it",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        440,
        460
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "58853029-9bce-4429-90ad-662c2c862110",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        840,
        460
      ],
      "parameters": {
        "values": {
          "number": [
            {
              "name": "id"
            }
          ],
          "string": [
            {
              "name": "name",
              "value": "Tanay"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1,
      "id": "cac7592e-b89b-4262-8181-62e18307bbfa",
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "name": "QuestDB",
      "type": "n8n-nodes-base.questDb",
      "position": [
        640,
        460
      ],
      "parameters": {
        "query": "CREATE TABLE test (id INT, name STRING);",
        "operation": "executeQuery"
      },
      "credentials": {
        "questDb": "QuestDB"
      },
      "typeVersion": 1,
      "alwaysOutputData": true,
      "id": "dec3d257-12c7-45a7-9932-ee4a4a3c210d",
      "notes": "This questDb node performs automated tasks as part of the workflow."
    },
    {
      "name": "QuestDB1",
      "type": "n8n-nodes-base.questDb",
      "position": [
        1040,
        460
      ],
      "parameters": {
        "table": "test",
        "columns": "id, name"
      },
      "credentials": {
        "questDb": "QuestDB"
      },
      "typeVersion": 1,
      "id": "5a957acf-d4f6-403a-bab7-16278bae0823",
      "notes": "This questDb node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-629511f8",
     ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "id": "164",
  "name": "Create a channel, invite users to the channel, post a message, and upload a file",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        250
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "node-f2d6391b"
    },
    {
      "name": "Slack",
      "type": "n8n-nodes-base.slack",
      "position": [
        450,
        250
      ],
      "parameters": {
        "resource": "channel",
        "channelId": "n8n-docs",
        "additionalFields": {}
      },
      "credentials": {
        "slackApi": "Slack Bot Access Token"
      },
      "typeVersion": 1,
      "id": "node-f6d75bfd"
    },
    {
      "name": "Slack1",
      "type": "n8n-nodes-base.slack",
      "position": [
        650,
        250
      ],
      "parameters": {
        "userIds": [
          "U01797FGD6J"
        ],
        "resource": "channel",
        "channelId": "={{$node[\"Slack\"].json[\"id\"]}}",
        "operation": "invite"
      },
      "credentials": {
        "slackApi": "Slack Bot Access Token"
      },
      "typeVersion": 1,
      "id": "node-e4a466b3"
    },
    {
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1050,
        250
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "responseFormat": "file"
      },
      "typeVersion": 1,
      "id": "node-218560ea"
    },
    {
      "name": "Slack2",
      "type": "n8n-nodes-base.slack",
      "position": [
        850,
        250
      ],
      "parameters": {
        "text": "Welcome to the channel!",
        "as_user": true,
        "channel": "={{$node[\"Slack\"].json[\"id\"]}}",
        "attachments": [
          {
            "title": "Logo",
            "image_url": "{{ $env.BASE_URL }}"
          }
        ],
        "otherOptions": {}
      },
      "credentials": {
        "slackApi...

Output:
The node 'Slack3' (type: n8n-nodes-base.slack) 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": {
  "slackApi": "Slack Bot Access Token"
}
```

**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 'Slack3' 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": "165",
  "name": "Create, update and get a user from Iterable",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        310,
        340
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "4a7b34f6-53d1-4f78-99c6-6c8c224abfa8",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Iterable",
      "type": "n8n-nodes-base.iterable",
      "position": [
        510,
        340
      ],
      "parameters": {
        "value": "",
        "identifier": "email",
        "additionalFields": {}
      },
      "credentials": {
        "iterableApi": "Iterable"
      },
      "typeVersion": 1,
      "id": "991b9e3e-7054-4293-b4c2-a772535672f4",
      "notes": "This iterable node performs automated tasks as part of the workflow."
    },
    {
      "name": "Iterable1",
      "type": "n8n-nodes-base.iterable",
      "position": [
        710,
        340
      ],
      "parameters": {
        "value": "={{$node[\"Iterable\"].parameter[\"value\"]}}",
        "identifier": "email",
        "additionalFields": {
          "dataFieldsUi": {
            "dataFieldValues": [
              {
                "key": "YOUR_CREDENTIAL_HERE",
                "value": ""
              }
            ]
          }
        }
      },
      "credentials": {
        "iterableApi": "Iterable"
      },
      "typeVersion": 1,
      "id": "236a5b4c-dbed-4e56-86d9-01629d1e7361",
      "notes": "This iterable node performs automated tasks as part of the workflow."
    },
    {
      "name": "Iterable2",
      "type": "n8n-nodes-base.iterable",
      "position": [
        910,
        340
      ],
      "parameters": {
        "email": "={{$node[\"Iterable\"].parameter[\"value\"]}}",
        "operation": "get"
      },
      "credentials": {
        "iterableApi": "Iterable"
      },
      "typeVersion": 1,
      "id": "ccaa85aa-4a13-...

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

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

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

**Solutions**:

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

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

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

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

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

Configure appropriate timeouts and error handling for HTTP requests.


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

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

Workflow JSON:
{
  "id": "167",
  "name": "Create a short URL and get the statistics of the URL",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        370,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "72611b23-5b85-46bd-821b-3000f08c7d19",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Yourls",
      "type": "n8n-nodes-base.yourls",
      "position": [
        570,
        300
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "additionalFields": {
          "title": "Sending SMS the Low-Code Way with Airtable, Twilio Programmable SMS, and n8n"
        }
      },
      "credentials": {
        "yourlsApi": "{{ $env.BASE_URL }}"
      },
      "typeVersion": 1,
      "id": "4a287c84-792c-4cdd-a1b4-bfd56752585b",
      "notes": "This yourls node performs automated tasks as part of the workflow."
    },
    {
      "name": "Yourls1",
      "type": "n8n-nodes-base.yourls",
      "position": [
        770,
        300
      ],
      "parameters": {
        "shortUrl": "{{ $env.BASE_URL }}",
        "operation": "stats"
      },
      "credentials": {
        "yourlsApi": "{{ $env.BASE_URL }}"
      },
      "typeVersion": 1,
      "id": "40ee6fc8-8ad3-4fac-aa0f-9b7e1f34548d",
      "notes": "This yourls node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-11c50701",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "={{ $node.NonExistentNode.json.data }}",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "exec...

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": [
        120,
        560
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "node-4aea53f9"
    },
    {
      "name": "SortElements",
      "type": "n8n-nodes-base.itemLists",
      "position": [
        480,
        560
      ],
      "parameters": {
        "options": {},
        "operation": "sort",
        "sortFieldsUi": {
          "sortField": [
            {
              "fieldName": "UserName"
            },
            {
              "fieldName": "TaskTitle"
            },
            {
              "fieldName": "date"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "node-44c1035b"
    },
    {
      "name": "Markdown",
      "type": "n8n-nodes-base.markdown",
      "position": [
        1340,
        580
      ],
      "parameters": {
        "mode": "markdownToHtml",
        "options": {
          "tables": true,
          "noHeaderId": true,
          "rawHeaderId": false,
          "simpleLineBreaks": true,
          "customizedHeaderId": false,
          "completeHTMLDocument": true
        },
        "markdown": "={{$json[\"mdreport\"]}}"
      },
      "typeVersion": 1,
      "id": "node-5d45eb27"
    },
    {
      "name": "CreateMDReport",
      "type": "n8n-nodes-base.function",
      "position": [
        1160,
        580
      ],
      "parameters": {
        "functionCode": "// created report header and custom table style\nvar md_reporthead=\"#Timesheet report\\n\";\nvar md_style =  (`\n<style> table {border: 0.5px solid; border-spacing: 0px;}\n        table th {border-bottom: 0.5px solid;}\n        table thead {background: #D0E4F5;}\n        table tr:nth-child(even) { background: #D8D8D8;}\n</style>\\n\\n`);\n\nvar md_reportbody=md_style+md_reporthead;\n\n//declare several variables that are used for report generation\nvar tablehead = \"| Date | Hours | Task Descr...

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:
{
  "name" "Very quick quickstart",
  "nodes": [
    {
      "id": "cbb6afcc-f900-434d-ad2e-affb31ccf7a9",
      "name": "Customer Datastore",
      "type": "n8n-nodes-base.n8nTrainingCustomerDatastore",
      "position": [
        1000,
        740
      ],
      "parameters": {
        "operation": "getAllPeople",
        "returnAll": true
      },
      "typeVersion": 1,
      "notes": "This n8nTrainingCustomerDatastore node performs automated tasks as part of the workflow."
    },
    {
      "id": "1eb939c0-e391-4e3b-9751-889da2de7cf7",
      "name": "Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        460,
        460
      ],
      "parameters": {
        "width": 300,
        "height": 220,
        "content": "## About the very quick quickstart workflow\n\nThis is an incomplete workflow, used in the [very quick quickstart]({{ $env.WEBHOOK_URL }} tutorial."
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "c53a8591-9efe-4fb8-993b-6cc309f3240e",
      "name": "Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        940,
        640
      ],
      "parameters": {
        "width": 220,
        "height": 300,
        "content": "**Get fake sample data**"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "c7e35ca4-b180-4280-9e43-a5dda5d3ea97",
      "name": "Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1220,
        640
      ],
      "parameters": {
        "width": 220,
        "height": 300,
        "content": "**Extract data and prepare it for use in the next node**"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "94bba884-5cef-4fe6-ba7d-cc7dbe49839c",
      "name": "When clicking \"Test Work...

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: 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": "170",
  "name": "Create, update, and get a post in Ghost",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        310,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "afd1b494-bdd9-4c27-99c2-a94228f28384",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Ghost",
      "type": "n8n-nodes-base.ghost",
      "position": [
        510,
        300
      ],
      "parameters": {
        "title": "Running ghost with n8n!",
        "source": "adminApi",
        "content": "
In this article, you will learn how to automate your Ghost site with n8n!
",
        "operation": "create",
        "additionalFields": {}
      },
      "credentials": {
        "ghostAdminApi": "Ghost Admin API"
      },
      "typeVersion": 1,
      "id": "87fae161-644b-475b-a228-8a56398649d9",
      "notes": "This ghost node performs automated tasks as part of the workflow."
    },
    {
      "name": "Ghost1",
      "type": "n8n-nodes-base.ghost",
      "position": [
        710,
        300
      ],
      "parameters": {
        "postId": "={{ $env.UNDEFINED_ENV_VAR }}",
        "source": "adminApi",
        "operation": "update",
        "updateFields": {
          "status": "published"
        }
      },
      "credentials": {
        "ghostAdminApi": "Ghost Admin API"
      },
      "typeVersion": 1,
      "id": "ebb0602b-f045-45be-b987-3a9e60608b74",
      "notes": "This ghost node performs automated tasks as part of the workflow."
    },
    {
      "name": "Ghost2",
      "type": "n8n-nodes-base.ghost",
      "position": [
        910,
        300
      ],
      "parameters": {
        "by": "id",
        "source": "adminApi",
        "options": {},
        "identifier": "={{$node[\"Ghost\"].json[\"id\"]}}"
      },
      "credentials": {
        "ghostAdminApi": "Ghost Admin API"
      },
      "t...

Output:
In node 'Ghost1', the parameter 'postId' contains an expression that references undefined data.

**Faulty Expression**: `={{ $env.UNDEFINED_ENV_VAR }}`
**Original Value**: `={{$node["Ghost"].json["id"]}}`

**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 'Ghost1' parameter 'postId'.


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": "171",
  "name": "Insert and update data in Airtable",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        500,
        350
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "2dc81718-e745-4156-8d6e-e4ad2c7ad530",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Airtable",
      "type": "n8n-nodes-base.airtable",
      "position": [
        900,
        350
      ],
      "parameters": {
        "table": "Table 1",
        "options": {},
        "operation": "append",
        "application": ""
      },
      "credentials": {
        "airtableApi": "Airtable Credentials n8n"
      },
      "typeVersion": 1,
      "id": "3f66f5dd-eb98-4c3b-af40-45119b5d764c",
      "notes": "This airtable node performs automated tasks as part of the workflow."
    },
    {
      "name": "Airtable1",
      "type": "n8n-nodes-base.airtable",
      "position": [
        1100,
        350
      ],
      "parameters": {
        "table": "={{$node[\"Airtable\"].parameter[\"table\"]}}",
        "operation": "list",
        "application": "={{$node[\"Airtable\"].parameter[\"application\"]}}",
        "additionalOptions": {
          "filterByFormula": "Name='n8n'"
        }
      },
      "credentials": {
        "airtableApi": "Airtable Credentials n8n"
      },
      "typeVersion": 1,
      "id": "50409437-9ec8-41c5-8252-115f660ad801",
      "notes": "This airtable node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        700,
        350
      ],
      "parameters": {
        "values": {
          "number": [
            {
              "name": "ID",
              "value": 3
            }
          ],
          "string": [
            {
              "name": "Name",
              "value": "n8n"
            }
          ]...

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

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

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

**Solutions**:

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

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

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

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

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

Add validation for empty or null input data.


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

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

Workflow JSON:
{
  "id": "172",
  "name": "Create a table, and insert and update data in the table in Snowflake",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "5a1fbad9-ef25-4bbc-ad88-0e132590cc18",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        650,
        300
      ],
      "parameters": {
        "values": {
          "number": [
            {
              "name": "id",
              "value": 1
            }
          ],
          "string": [
            {
              "name": "name",
              "value": "n8n"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1,
      "id": "cac8336c-2f51-478f-9737-6b470ff88939",
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "name": "Snowflake",
      "type": "n8n-nodes-base.snowflake",
      "position": [
        450,
        300
      ],
      "parameters": {
        "query": "CREATE TABLE docs (id INT, name STRING);",
        "operation": "executeQuery"
      },
      "typeVersion": 1,
      "id": "382ede54-30dd-4a89-be28-0ec7c40dfa40",
      "notes": "This snowflake node performs automated tasks as part of the workflow."
    },
    {
      "name": "Snowflake1",
      "type": "n8n-nodes-base.snowflake",
      "position": [
        850,
        300
      ],
      "parameters": {
        "table": "docs",
        "columns": "id, name"
      },
      "credentials": {
        "snowflake": "Snowflake n8n Credentials"
      },
      "typeVersion": 1,
      "id": "1fa84be2-9f9d-497e-b882-f2764b531cb0",
      "notes": "This snowflake node performs automated tasks as part of the workflow."
    },
    {
      "name": ...

Output:
The node 'Snowflake' (type: n8n-nodes-base.snowflake) 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": {
  "snowflake": "Snowflake n8n 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 'Snowflake' 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": "173"
  "name": "Create and update a channel, and send a message on Twist",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        470,
        260
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "5cd6ce9d-89b8-41c6-b653-a71158c24880",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Twist",
      "type": "n8n-nodes-base.twist",
      "position": [
        670,
        260
      ],
      "parameters": {
        "name": "n8n-docs",
        "resource": "channel",
        "workspaceId": 150329,
        "additionalFields": {
          "user_ids": [
            475370
          ]
        }
      },
      "credentials": {
        "twistOAuth2Api": "Twist OAuth Credentials"
      },
      "typeVersion": 1,
      "id": "a6547e43-a382-46ea-8f30-5c487803d0ca",
      "notes": "This twist node performs automated tasks as part of the workflow."
    },
    {
      "name": "Twist1",
      "type": "n8n-nodes-base.twist",
      "position": [
        870,
        260
      ],
      "parameters": {
        "resource": "channel",
        "channelId": "={{$node[\"Twist\"].json[\"id\"]}}",
        "operation": "update",
        "updateFields": {
          "description": "Discussion for documentation"
        }
      },
      "credentials": {
        "twistOAuth2Api": "Twist OAuth Credentials"
      },
      "typeVersion": 1,
      "id": "90553466-1c1d-4cc9-9375-72f6990cf9c3",
      "notes": "This twist node performs automated tasks as part of the workflow."
    },
    {
      "name": "Twist2",
      "type": "n8n-nodes-base.twist",
      "position": [
        1070,
        260
      ],
      "parameters": {
        "content": "=Hey [Harshil](twist-mention://475370)!\nYou have been added to the {{$node[\"Twist\"].json[\"name\"]}} channel.\nClick on the button below to quickly navigate to the documentation website."...

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: Syntax Error

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'"
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        1140,
        780
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "baaa5348-09b2-4e78-b31e-4e24ade5d22b",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1480,
        760
      ],
      "parameters": {
        "width": 560,
        "height": 400,
        "content": "## 2. Advanced way: Using Expressions\nIn this `Set` node, we set dates using [Luxon expressions]({{ $env.WEBHOOK_URL }} for the following formats:\n\nNow - `{{$now}}`\nCurrent time with seconds - `{{$now.toLocaleString(DateTime.TIME_WITH_SECONDS)}}`\nToday - `{{$today}}`\nTomorrow - `{{$today.plus({days: 1})}}`\nOne hour ago - `{{$now.minus({hours: 1})}}`\nWeekday name - `{{$today.weekdayLong}}`\n\n"
      },
      "typeVersion": 1,
      "id": "14b61adb-f252-4a81-8a03-3a19e2f657ae",
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "name": "Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        660,
        780
      ],
      "parameters": {
        "width": 420,
        "height": 100,
        "content": "### Click the `Execute Workflow` button and double click on the nodes to see the input and output items."
      },
      "typeVersion": 1,
      "id": "02764d7a-551c-40e3-8b03-e86f39f9ae30",
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "name": "12 Hours from now",
      "type": "n8n-nodes-base.dateTime",
      "position": [
        1520,
        580
      ],
      "parameters": {
        "value": "={{$now}}",
        "action": "calculate",
        "options": {},
        "duration": 12,
        "timeUnit": "hours"
      },
      "typeVersion": 1,
      "id": "dc12...

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": [
        20,
        720
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "ee4ce933-842c-495a-b06c-bbe55f127b87",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Customer Datastore",
      "type": "n8n-nodes-base.n8nTrainingCustomerDatastore",
      "position": [
        220,
        720
      ],
      "parameters": {
        "operation": "getAllPeople"
      },
      "typeVersion": 1,
      "id": "7a5d136d-04f5-4c72-bef2-07cabbe2882b",
      "notes": "This n8nTrainingCustomerDatastore node performs automated tasks as part of the workflow."
    },
    {
      "name": "Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        500,
        600
      ],
      "parameters": {
        "width": 520,
        "height": 280,
        "content": "## 2. If with And/Or conditions\nSet the **Combine** field to: \n`ALL` for `AND` condition\n`ANY` for `OR` condition"
      },
      "typeVersion": 1,
      "id": "5a2a5ab4-8496-4b1d-bb05-b27405e10442",
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "name": "Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        500,
        920
      ],
      "parameters": {
        "width": 520,
        "height": 360,
        "content": "## 3. Multiple branches\nWe use the `Switch` when there more than 2 possible outcomes to the filtering. We do that by specifying the condition under **Routing rules** inside the node.\n\nIn this example we send all **US-based** customers data to route 0, **customers from CO** to route 1, **customers from the UK** to route 2, and all the rest to route 3 as a fallback"
      },
      "typeVersion": 1,
      "id": "13ca8aa4-3b1e-4e83-9192-0e32e96ac16d",
      "notes": "This stickyNote node performs automa...

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:
{
  "meta": {
    "instanceId": "workflow-9532ccbb",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.744032",
    "updatedAt": "2025-09-29T07:07:48.744053",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "25ac6cda-31fb-474a-b6b6-083ec03b9273",
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        925,
        285
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "93eaee43-7a39-4c83-aeaa-9ca14d0f4b4b",
      "name": "Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        380,
        240
      ],
      "parameters": {
        "width": 440,
        "height": 200,
        "content": "## HTTP Request\n### This workflow shows the most common use cases of the HTTP request node, and how to handle its output\n\n\n### Click the `Execute Workflow` button and double click on the nodes to see the input and output items."
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "3ccdc45b-aae1-4760-b45e-5b8dca2a9fcf",
      "name": "Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1280,
        480
      ],
      "parameters": {
        "width": 986.3743856726365,
        "height": 460.847917534361,
        "content": "## 3. Handle Pagination\n### Sometimes you need to make the same request multiple times to get all the data you need (pagination).\n\n### The pagination process goes as follow:\n### 1. Loop through the pages of the input source (`HTTP Request` node named \"Get my Starts\")\n### 2. Increment the page at the end of each loop (done with the `set` node named \"Increment Page\") \n### 3. Stop ...

Output:
The node 'HTTP Request - Get my Stars' 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 'HTTP Request - Get my Stars'.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        1160,
        480
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "8ad37748-4466-404a-bc5d-eeba8ab0228d",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        800,
        420
      ],
      "parameters": {
        "width": 320,
        "height": 200,
        "content": "### Very often your data is not in the right format to insert in a node. you can use the set node to fix it.\n\n### Click the `Execute Workflow` button and double click on the nodes to see the input and output items."
      },
      "typeVersion": 1,
      "id": "1466358c-aa92-452a-ae06-59a574d5f111",
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "name": "Create or Update record in Google Sheet",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1920,
        480
      ],
      "parameters": {
        "range": "A:C",
        "options": {},
        "sheetId": "13_bAEYNTzVXVY6SfAkBa9ijtJGSxPd8D-hcXXwXtdDo",
        "operation": "upsert",
        "authentication": "{{ $credentials.oAuth2 }}"
      },
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "{{ $credentials.googleSheetsOAuth2Api.id }}",
          "name": "Sheets"
        }
      },
      "typeVersion": 1,
      "id": "bfe3d629-7f0a-482d-bb04-65002a73abbc",
      "notes": "This googleSheets node performs automated tasks as part of the workflow."
    },
    {
      "name": "Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1480,
        360
      ],
      "parameters": {
        "width": 400,
        "height": 280,
        "content": "\nThis is where we put the data in the format that Google Sheets expect. \nThis mean...

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

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'Set - Prepare 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:
{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "5266b0b3-ffa3-4c72-b66f-f091532293c7",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Is new?",
      "type": "n8n-nodes-base.if",
      "position": [
        680,
        300
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{$json[\"Processed\"]}}",
              "operation": "isEmpty"
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "8571d850-4fe0-4846-a439-69a2bf359711",
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "name": "Do something here",
      "type": "n8n-nodes-base.noOp",
      "position": [
        900,
        100
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "fa0c018c-adb9-413d-b6e3-931ced8fa60f",
      "notes": "This noOp node performs automated tasks as part of the workflow."
    },
    {
      "name": "Mark Row as processed",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1120,
        300
      ],
      "parameters": {
        "key": "YOUR_CREDENTIAL_HERE",
        "options": {},
        "sheetId": "1SdnwaIJ6xwaZl006FmK2j4f-b00tq7tT7iQgdfe7Qh4",
        "operation": "update",
        "authentication": "{{ $credentials.oAuth2 }}",
        "_injected_number_field": "not_a_number"
      },
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "{{ $credentials.googleSheetsOAuth2Api.id }}",
          "name": "Google Sheets account"
        }
      },
      "typeVersion": 1,
      "id": "35314056-ebf2-4e3f-9b30-1f02a8dfd3fb",
      "notes": "This googleSheets node performs automated tasks as part of the workflow."
    },
    {
      "name": "Read ...

Output:
The node 'Mark Row as processed' 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 'Mark Row as processed'.


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": "175",
  "name": "Get messages with a certain label, remove the label, and add a new one",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "e55664fa-a13f-4ae4-8b99-7a13080cda6f",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Gmail",
      "type": "n8n-nodes-base.gmail",
      "position": [
        450,
        300
      ],
      "parameters": {
        "resource": "message",
        "operation": "getAll",
        "additionalFields": {
          "format": "full",
          "labelIds": [
            "Label_103811885290186237"
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": "Gmail"
      },
      "typeVersion": 1,
      "id": "34882df0-82e9-420e-8c49-576f975b6b55",
      "notes": "This gmail node performs automated tasks as part of the workflow."
    },
    {
      "name": "Gmail1",
      "type": "n8n-nodes-base.gmail",
      "position": [
        650,
        300
      ],
      "parameters": {
        "labelIds": [
          "Label_103811885290186237"
        ],
        "resource": "messageLabel",
        "messageId": "={{$node[\"Gmail\"].json[\"id\"]}}",
        "operation": "remove",
        "_injected_number_field": "not_a_number"
      },
      "credentials": {
        "gmailOAuth2": "Gmail"
      },
      "typeVersion": 1,
      "id": "3f045cd9-0cb9-4700-a551-4d2d58ecd79e",
      "notes": "This gmail node performs automated tasks as part of the workflow."
    },
    {
      "name": "Gmail2",
      "type": "n8n-nodes-base.gmail",
      "position": [
        850,
        300
      ],
      "parameters": {
        "labelIds": [
          "Label_140673791182006844"
        ],
        "resource": "messageLabel",
        "messageId": "={{$node[\"Gmail\"].json[\"id\"]}}"
      },
      "creden...

Output:
The node 'Gmail1' has a data type mismatch in its parameters.

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

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

**Solutions**:

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

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

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

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


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

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

Workflow JSON:
{
  "id" "176",
  "name": "Get the logo, icon, and information of a company and store it in Airtable",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "e17e32c8-3ceb-409b-93da-dd27715236d5",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Brandfetch",
      "type": "n8n-nodes-base.Brandfetch",
      "position": [
        450,
        300
      ],
      "parameters": {
        "domain": "n8n.io"
      },
      "credentials": {
        "brandfetchApi": "Brandfetch n8n credentials"
      },
      "typeVersion": 1,
      "id": "dd22c8cd-5af8-4981-83d8-cca348331fe7",
      "notes": "This Brandfetch node performs automated tasks as part of the workflow."
    },
    {
      "name": "Brandfetch1",
      "type": "n8n-nodes-base.Brandfetch",
      "position": [
        650,
        300
      ],
      "parameters": {
        "domain": "={{$node[\"Brandfetch\"].parameter[\"domain\"]}}",
        "operation": "company"
      },
      "credentials": {
        "brandfetchApi": "Brandfetch n8n credentials"
      },
      "typeVersion": 1,
      "id": "f09c1b9b-2bd1-4bb1-a143-42c1037b34c3",
      "notes": "This Brandfetch node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        850,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "Name",
              "value": "={{$node[\"Brandfetch1\"].json[\"name\"]}}"
            },
            {
              "name": "Icon URL",
              "value": "={{$node[\"Brandfetch\"].json[\"icon\"][\"image\"]}}"
            },
            {
              "name": "Logo URL",
              "value": "={{$node[\"Brandfetch\"].json[\"logo\"][\"image\"]}}"...

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "70a44436-4b51-458a-ae93-60edeed170de",
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "d4c2dfa2-30bb-4f06-96c2-5811472302d2",
      "name": "Cron",
      "type": "n8n-nodes-base.cron",
      "position": [
        240,
        100
      ],
      "parameters": {
        "triggerTimes": {
          "item": [
            {
              "mode": "custom",
              "cronExpression": "15 7 * * 1-6"
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This cron node performs automated tasks as part of the workflow."
    },
    {
      "id": "86924546-e4f2-4795-8e80-9e49626d2c42",
      "name": "Baserow",
      "type": "n8n-nodes-base.baserow",
      "position": [
        460,
        200
      ],
      "parameters": {
        "tableId": 680,
        "databaseId": 146,
        "additionalOptions": {}
      },
      "credentials": {
        "baserowApi": {
          "id": "{{ $credentials.baserowApi.id }}",
          "name": "Baserow account"
        }
      },
      "typeVersion": 1,
      "notes": "This baserow node performs automated tasks as part of the workflow."
    },
    {
      "id": "36f2947b-67cf-47eb-891f-e7e3b5ba9eac",
      "name": "Fetch tradegate stock page",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        680,
        200
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "options": {},
        "responseFormat": "string",
        "queryParametersUi": {
          "parameter": [
            {
              "name": "isin",
              "value": "={{$json[\"ISIN\"]}}"
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This httpRequest node performs automat...

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

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

**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 'SendGrid' parameter 'subject'.


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": "178",
  "name": "Create a channel, add a member, and post a message to the channel",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        340
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "f5345efb-7ff5-4019-8231-64989b3b9083",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Mattermost",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        470,
        340
      ],
      "parameters": {
        "teamId": "4zhpirmh97fn7jgp7qhyue5a6e",
        "channel": "docs",
        "resource": "channel",
        "displayName": "Docs"
      },
      "credentials": {
        "mattermostApi": "Mattermost Credentials"
      },
      "typeVersion": 1,
      "id": "00a14ba6-6b96-47c8-bedf-cdc9f8cd2790",
      "notes": "This mattermost node performs automated tasks as part of the workflow."
    },
    {
      "name": "Mattermost1",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        670,
        340
      ],
      "parameters": {
        "userId": "5oiy71hukjgd9eprj1o4a3poio",
        "resource": "channel",
        "channelId": "={{$node[\"Mattermost\"].json[\"id\"]}}",
        "operation": "={{ $env.UNDEFINED_ENV_VAR }}"
      },
      "credentials": {
        "mattermostApi": "Mattermost Credentials"
      },
      "typeVersion": 1,
      "id": "b767bd9f-87e5-490e-9f5f-7f2c4d294ba2",
      "notes": "This mattermost node performs automated tasks as part of the workflow."
    },
    {
      "name": "Mattermost2",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        870,
        340
      ],
      "parameters": {
        "message": "Hey! Welcome to the channel!",
        "channelId": "={{$node[\"Mattermost\"].json[\"id\"]}}",
        "attachments": [],
        "otherOptions": {}
      },
      "credentials": {
        "mattermostApi": "Matt...

Output:
In node 'Mattermost1', the parameter 'operation' contains an expression that references undefined data.

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

**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 'Mattermost1' parameter 'operation'.


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": [
    {
      "id": "29451054-fcd6-4054-b072-a87c716f6c67",
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        240
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "995ae9b0-130c-4989-8e94-81a14b7743c4",
      "name": "Read Google Sheet",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        460,
        240
      ],
      "parameters": {
        "options": {},
        "sheetId": "1cz-4tVi7Nn3j1gh147hROq9l6S4ta06sMfhm2AAI6js"
      },
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "{{ $credentials.googleSheetsOAuth2Api.id }}",
          "name": "Tom's Google Sheets account"
        }
      },
      "typeVersion": 2,
      "notes": "This googleSheets node performs automated tasks as part of the workflow."
    },
    {
      "id": "2c1ed019-85f1-4b0f-bcf5-ce59ff13ea49",
      "name": "Search Salesforce accounts",
      "type": "n8n-nodes-base.salesforce",
      "position": [
        680,
        240
      ],
      "parameters": {
        "query": "=SELECT id, Name FROM Account WHERE Name = '{{$json[\"Company Name\"].replace(/'/g, '\\\\\\'')}}'",
        "resource": "search"
      },
      "credentials": {
        "salesforceOAuth2Api": {
          "id": "{{ $credentials.salesforceOAuth2Api.id }}",
          "name": "Salesforce account"
        }
      },
      "typeVersion": 1,
      "alwaysOutputData": false,
      "notes": "This salesforce node performs automated tasks as part of the workflow."
    },
    {
      "id": "c6978a27-3cdc-44a2-a961-94557b2aed88",
      "name": "Keep new companies",
      "type": "n8n-nodes-base.merge",
      "position": [
        900,
        40
      ],
      "parameters": {
        "mode": "removeKeyMatches",
        "propertyName1": "Company Name",
        "propertyName2": "Name"
 ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "76f6b074-32a5-4419-aa0f-80505b3a31ad:
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        20,
        240
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "42289f01-3af9-4bc3-babb-54b983de7e77",
      "name": "Search Salesforce accounts",
      "type": "n8n-nodes-base.salesforce",
      "position": [
        680,
        240
      ],
      "parameters": {
        "query": "=SELECT id, Name FROM Account WHERE Name = '{{$json[\"Company Name\"].replace(/'/g, '\\\\\\'')}}'",
        "resource": "search"
      },
      "credentials": {
        "salesforceOAuth2Api": {
          "id": "{{ $credentials.salesforceOAuth2Api.id }}",
          "name": "Salesforce account"
        }
      },
      "typeVersion": 1,
      "alwaysOutputData": false,
      "notes": "This salesforce node performs automated tasks as part of the workflow."
    },
    {
      "id": "954ef43f-4dc1-4955-9c56-c5d11bcd5d6e",
      "name": "Keep new companies",
      "type": "n8n-nodes-base.merge",
      "position": [
        900,
        40
      ],
      "parameters": {
        "mode": "removeKeyMatches",
        "propertyName1": "Company Name",
        "propertyName2": "Name"
      },
      "typeVersion": 1,
      "notes": "This merge node performs automated tasks as part of the workflow."
    },
    {
      "id": "ec23bd4f-c6ee-4c2a-a352-8ff521a5ddf6",
      "name": "Merge existing account data",
      "type": "n8n-nodes-base.merge",
      "position": [
        900,
        440
      ],
      "parameters": {
        "mode": "mergeByKey",
        "propertyName1": "Company Name",
        "propertyName2": "Name"
      },
      "typeVersion": 1,
      "notes": "This merge node performs automated tasks as part of the workflow."
    },
    {
      "id": "85b460ee-e6b4-48c8-8315-ccf7875ec345",
...

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: 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": "179",
  "name": "Create, update, and get a document in Google Cloud Firestore",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "f5b5b207-b5d4-47b1-81ee-89d4b2f27b8d",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Google Cloud Firestore",
      "type": "n8n-nodes-base.googleFirebaseCloudFirestore",
      "position": [
        650,
        300
      ],
      "parameters": {
        "columns": "id, name",
        "operation": "create",
        "projectId": "docs-f8925",
        "collection": "n8n"
      },
      "typeVersion": 1,
      "id": "cc6e9d96-39ca-47eb-a3d7-cc4dd024d01b",
      "notes": "This googleFirebaseCloudFirestore node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        450,
        300
      ],
      "parameters": {
        "values": {
          "number": [
            {
              "name": "id",
              "value": 1
            }
          ],
          "string": [
            {
              "name": "name",
              "value": "n8n"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1,
      "id": "86548bc9-c3e4-48ea-90c4-0ac21e3d421f",
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "name": "Set1",
      "type": "n8n-nodes-base.set",
      "position": [
        850,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "name",
              "value": "nodemation"
            },
            {
              "name": "document_id",
              "value": "={{$node[\"Google Cloud Firestore\"].json[\"_id\"]}}"
            }
          ]
        },
  ...

Output:
The node 'Google Cloud Firestore' (type: n8n-nodes-base.googleFirebaseCloudFirestore) 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": {
  "googleFirebaseCloudFirestoreOAuth2Api": "Cloud Firestore 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 Cloud Firestore' node.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "d0c92688-14fc-4393-a1d6-926eb867b81e",
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        180,
        240
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "0edbad78-249b-441c-877d-bac57fb44a91",
      "name": "Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        180,
        31
      ],
      "parameters": {
        "width": 436,
        "height": 169,
        "content": "## n8n version\n\nThis workflow was created using n8n version 0.197.1 and uses a new [expression syntax]({{ $env.WEBHOOK_URL }} as well as a new version of the Merge node. Make sure you're also using n8n version 0.197.1 or newer when running this workflow."
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "251d893c-11cb-4702-a289-44f198581722",
      "name": "Download XML File",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        400,
        240
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "options": {}
      },
      "typeVersion": 3,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "0973b302-1ba9-4faf-9d6c-2caca1b301f5",
      "name": "Parse XML content",
      "type": "n8n-nodes-base.xml",
      "position": [
        620,
        240
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This xml node performs automated tasks as part of the workflow."
    },
    {
      "id": "01854111-27cb-40c1-b95e-14f91f89e9f1",
      "name": "Create new spreadsheet file",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1060,
        140
      ],
      "parameters": {
        "title"...

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: Disconnected Node

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-f4bb82e5",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.791423",
    "updatedAt": "2025-09-29T07:07:48.791432",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "aecce7a8-24f6-48c0-a7f0-f48a421d1d8c",
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        540,
        400
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "66822f20-83a9-4272-920c-5d8c9140f912",
      "name": "Read From File",
      "type": "n8n-nodes-base.readBinaryFile",
      "position": [
        740,
        400
      ],
      "parameters": {
        "filePath": "/home/node/.n8n/concerts-2023.csv"
      },
      "typeVersion": 1,
      "notes": "This readBinaryFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "9b469774-7c1d-41a3-9bfe-18fc3527f96e",
      "name": "Convert To Spreadsheet",
      "type": "n8n-nodes-base.spreadsheetFile",
      "position": [
        940,
        400
      ],
      "parameters": {
        "options": {
          "rawData": true,
          "readAsString": true
        }
      },
      "typeVersion": 1,
      "notes": "This spreadsheetFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "a10bd105-16f7-47c8-b5a0-a5a10e51ae10",
      "name": "Insert into MySQL",
      "type": "n8n-nodes-base.mySql",
      "position": [
        1140,
        400
      ],
      "parameters": {
        "table": {
          "__rl": true,
          "mode": "name",
          "value": "concerts_2023_csv"
        },
        "columns": "Date, Band, ConcertName, Country, City, Location, LocationAddress",
        "options": {}
      },
      "credentials...

Output:
The workflow has a broken data flow. The node '9b469774-7c1d-41a3-9bfe-18fc3527f96e' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for '9b469774-7c1d-41a3-9bfe-18fc3527f96e'.

**Impact**: Data from '9b469774-7c1d-41a3-9bfe-18fc3527f96e' will not flow to any downstream nodes, effectively stopping the workflow at this point.

**Solution**:
1. Open the workflow in the n8n editor
2. Draw a connection from '9b469774-7c1d-41a3-9bfe-18fc3527f96e' to the next node in the flow
3. Verify the connection appears in the connections object

**Programmatic Fix**: Add the connection back to the workflow JSON:
```json
"connections": {
  "9b469774-7c1d-41a3-9bfe-18fc3527f96e": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect '9b469774-7c1d-41a3-9bfe-18fc3527f96e' to the workflow.


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-66f78b2e",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.791176",
    "updatedAt": "2025-09-29T07:07:48.791190",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "f60e3d5f-4da5-4201-8c78-00f4f410b397",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        600,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "724f285b-723e-4452-81a6-c066c6b6a0e4",
      "name": "TableName",
      "type": "n8n-nodes-base.set",
      "position": [
        780,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "TableName",
              "value": "concerts2"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "637356f0-fcde-4555-982c-a28159ce6885",
      "name": "LoadMySQLData",
      "type": "n8n-nodes-base.mySql",
      "position": [
        960,
        300
      ],
      "parameters": {
        "query": "=SELECT * FROM {{ $json[\"TableName\"] }}",
        "operation": "executeQuery"
      },
      "credentials": {
        "mySql": {
          "id": "{{ $credentials.mySql.id }}",
          "name": "MySQL n8n articles"
        }
      },
      "typeVersion": 1,
      "notes": "This mySql node performs automated tasks as part of the workflow."
    },
    {
      "id": "b3270629-35de-4746-aa51-293e7d20660d",
      "name": "SaveSpreadsheet",
      "type": "n8n-nodes-base.spreadsheetFile",
      "position": [
        1160,
        300
      ],
      "parameters": {
      ...

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

**Faulty Expression**: `={{ $json["non_existent_field"] }}`
**Original Value**: `## Save SQL table as a binary XLSX file
### You can send it via e-mail, upload to the file storage or download on your computer.
### Just connect one or two extra n8n Nodes here!`

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

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

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

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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-afc176f3",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.791623",
    "updatedAt": "2025-09-29T07:07:48.791631",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "d9bae984-2ce7-4f6b-ab53-527ac9dfea3d",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        680,
        320
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "32ecf73c-b6e9-4bd6-9ecc-d82c4c50d7b5",
      "name": "Reddit",
      "type": "n8n-nodes-base.reddit",
      "position": [
        880,
        320
      ],
      "parameters": {
        "keyword": "YOUR_CREDENTIAL_HERE",
        "location": "allReddit",
        "operation": "search",
        "additionalFields": {
          "sort": "new"
        }
      },
      "credentials": {},
      "typeVersion": 1,
      "notes": "This reddit node performs automated tasks as part of the workflow."
    },
    {
      "id": "4b560620-a101-4566-b066-4ce3f44d8b0c",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        120,
        180
      ],
      "parameters": {
        "width": 507.1052631578949,
        "height": 210.99380804953552,
        "content": "## What this workflow does\n\u2714\ufe0e 1) Get posts from reddit that might be about n8n\n    - Filter for the most relevant posts (posted in last 7 days and more than 5 upvotes and is original content)\n\n\u2714\ufe0e 2) Check if the post is actually about n8n\n\n\u2714\ufe0e 3) if it is, categorise with OpenAi.\n"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "f3be9af5-b4f...

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

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'OpenAI Summary'.


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": "189",
  "name": "Create, update, and get a subscriber using the e-goi node",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "03a24f31-a815-4dcb-a913-3477f0072f6d",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "e-goi",
      "type": "n8n-nodes-base.egoi",
      "position": [
        470,
        300
      ],
      "parameters": {
        "list": 1,
        "email": "nathan@testmail.com",
        "additionalFields": {
          "first_name": "Nathan"
        }
      },
      "credentials": {
        "egoiApi": "e-goi Credentials"
      },
      "typeVersion": 1,
      "id": "7c1a806b-6580-4c82-a776-965d89ec6d4b",
      "notes": "This egoi node performs automated tasks as part of the workflow."
    },
    {
      "name": "e-goi1",
      "type": "n8n-nodes-base.egoi",
      "position": [
        670,
        300
      ],
      "parameters": {
        "list": "={{$node[\"e-goi\"].parameter[\"list\"]}}",
        "contactId": "={{$node[\"e-goi\"].json[\"base\"][\"contact_id\"]}}",
        "operation": "update",
        "updateFields": {
          "first_name": "Nat"
        }
      },
      "typeVersion": 1,
      "id": "551808ba-b8c8-436f-b17f-856b99916e60",
      "notes": "This egoi node performs automated tasks as part of the workflow."
    },
    {
      "name": "e-goi2",
      "type": "n8n-nodes-base.egoi",
      "position": [
        870,
        300
      ],
      "parameters": {
        "list": "={{$node[\"e-goi\"].parameter[\"list\"]}}",
        "contactId": "={{$node[\"e-goi1\"].json[\"base\"][\"contact_id\"]}}",
        "operation": "get"
      },
      "credentials": {
        "egoiApi": "e-goi Credentials"
      },
      "typeVersion": 1,
      "id": "f2d989ae-0e45-4a2b-9b63-1b7172ec2b91",
      "notes": "This...

Output:
The node 'e-goi1' (type: n8n-nodes-base.egoi) 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": {
  "egoiApi": "e-goi 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 'e-goi1' node.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-90ec9a69",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.828086",
    "updatedAt": "2025-09-29T07:07:48.828095",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "4e670880-61cf-4870-8d29-525f4e677162",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -40,
        600
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "cd21e063-59fe-42a5-87c7-b4d63df2e2b7",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        500,
        480
      ],
      "parameters": {
        "width": 682,
        "height": 280,
        "content": "## Save SQL table as a CSV file\n### You can send it via e-mail, upload to the file storage or download on your computer.\n### Just connect one or two extra n8n Nodes here!"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "f960451e-d04e-4023-aed2-e039898b7cab",
      "name": "TableName",
      "type": "n8n-nodes-base.set",
      "position": [
        160,
        600
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "TableName",
              "value": "SalesLT.ProductCategory"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "e2b4f557-663e-4b1c-b90e-9fde44dcd63a",
      "name": "LoadMSSQLData",
      "type": "n8n-nodes-base.microsoftSql",
      "position": [
        340,
        600
      ],
      "parameters...

Output:
The workflow has a broken data flow. The node 'cec2452f-e3e9-47ad-bcc6-4d411b1cd532' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'cec2452f-e3e9-47ad-bcc6-4d411b1cd532'.

**Impact**: Data from 'cec2452f-e3e9-47ad-bcc6-4d411b1cd532' will not flow to any downstream nodes, effectively stopping the workflow at this point.

**Solution**:
1. Open the workflow in the n8n editor
2. Draw a connection from 'cec2452f-e3e9-47ad-bcc6-4d411b1cd532' to the next node in the flow
3. Verify the connection appears in the connections object

**Programmatic Fix**: Add the connection back to the workflow JSON:
```json
"connections": {
  "cec2452f-e3e9-47ad-bcc6-4d411b1cd532": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'cec2452f-e3e9-47ad-bcc6-4d411b1cd532' to the workflow.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "9d09405e-64a3-47ef-9d46-4942de51444b",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        400,
        460
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "4fdc396b-07bd-471e-9e62-136300804809",
      "name": "Set URLs",
      "type": "n8n-nodes-base.code",
      "position": [
        620,
        460
      ],
      "parameters": {
        "jsCode": "return [{\n  json: {\n    url: \"{{ $env.WEBHOOK_URL }}\"\n  }\n}, {\n  json: {\n    url: \"{{ $env.WEBHOOK_URL }}\"\n  }\n}, {\n  json: {\n    url: \"{{ $env.WEBHOOK_URL }}\"\n  }\n}]"
      },
      "typeVersion": 1,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "17482568-2117-4a8c-a307-ebf30dc9c560",
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        840,
        460
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {
          "response": {
            "response": {
              "responseFormat": "file"
            }
          }
        }
      },
      "typeVersion": 4,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "de27f52b-8f7e-4b9c-a097-987db4cef5aa",
      "name": "Merge items",
      "type": "n8n-nodes-base.code",
      "position": [
        1060,
        460
      ],
      "parameters": {
        "jsCode": "let binaries = {}, binary_keys = [];\n\nfor (const [index, inputItem] of Object.entries($input.all())) {\n  binaries[`data_${index}`] = inputItem.binary.data;\n  binary_keys.push(`data_${index}`);\n}\n\nreturn [{\n    json: {\n        binary_keys: binary_keys.join(',')\n    },\n    binary: binaries\n}];\n"
      },
      "typeVersion": 1,
      "notes": "This co...

Output:
The workflow has a broken data flow. The node '17482568-2117-4a8c-a307-ebf30dc9c560' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for '17482568-2117-4a8c-a307-ebf30dc9c560'.

**Impact**: Data from '17482568-2117-4a8c-a307-ebf30dc9c560' will not flow to any downstream nodes, effectively stopping the workflow at this point.

**Solution**:
1. Open the workflow in the n8n editor
2. Draw a connection from '17482568-2117-4a8c-a307-ebf30dc9c560' to the next node in the flow
3. Verify the connection appears in the connections object

**Programmatic Fix**: Add the connection back to the workflow JSON:
```json
"connections": {
  "17482568-2117-4a8c-a307-ebf30dc9c560": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect '17482568-2117-4a8c-a307-ebf30dc9c560' to the workflow.


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

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

Workflow JSON:
{
  "id": "191",
  "name": "Create a screenshot of a website and send it to a telegram channel",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "3b61edd6-0626-462b-85fb-891385f42150",
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "name": "Telegram",
      "type": "n8n-nodes-base.telegram",
      "position": [
        650,
        300
      ],
      "parameters": {
        "file": "={{$node[\"uProc\"].json[\"message\"][\"result\"]}}",
        "chatId": "",
        "operation": "sendPhoto",
        "additionalFields": {}
      },
      "credentials": {
        "telegramApi": "Telegram n8n bot"
      },
      "typeVersion": 1,
      "id": "15612eca-b4fb-423b-8b18-21bf8bf919d9",
      "notes": "This telegram node performs automated tasks as part of the workflow."
    },
    {
      "name": "uProc",
      "type": "n8n-nodes-base.uproc",
      "position": [
        450,
        300
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "tool": "getUrlScreenshot",
        "group": "image",
        "width": "1024",
        "fullpage": "yes",
        "additionalOptions": {},
        "_injected_number_field": "not_a_number"
      },
      "credentials": {
        "uprocApi": "uProc credentials"
      },
      "typeVersion": 1,
      "id": "ed26ff5c-38c9-4955-b8b7-1cbcaec5a920",
      "notes": "This uproc node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-da1cac2d",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "settings": {
    "executionOrder": "v1...

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

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

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

**Solutions**:

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

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

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

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


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

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

Workflow JSON:
{
  "id": "193",
  "name": "Create, add an attachment, and send a draft using the Microsoft Outlook node",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "node-78417d2a"
    },
    {
      "name": "Microsoft Outlook",
      "type": "n8n-nodes-base.microsoftOutlook",
      "position": [
        450,
        300
      ],
      "parameters": {
        "subject": "Hello from n8n!",
        "resource": "draft",
        "bodyContent": "
Hello from n8n!

We are sending this email using the Microsoft Outlook node in n8n

Best,

Sender
",
        "additionalFields": {
          "bodyContentType": "html"
        }
      },
      "credentials": {
        "microsoftOutlookOAuth2Api": "Micrsoft Outlook Credentials"
      },
      "typeVersion": 1,
      "id": "node-5598b45f"
    },
    {
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        650,
        300
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {},
        "responseFormat": "file"
      },
      "typeVersion": 1,
      "id": "node-4ddcf9f7"
    },
    {
      "name": "Microsoft Outlook1",
      "type": "n8n-nodes-base.microsoftOutlook",
      "position": [
        850,
        300
      ],
      "parameters": {
        "resource": "messageAttachment",
        "messageId": "={{$node[\"Microsoft Outlook\"].json[\"id\"]}}",
        "additionalFields": {
          "fileName": "n8n.png"
        }
      },
      "credentials": {
        "microsoftOutlookOAuth2Api": "Micrsoft Outlook Credentials"
      },
      "typeVersion": 1,
      "id": "node-2d129aec"
    },
    {
      "name": "Microsoft Outlook2",
      "type": "n8n-nodes-base.microsoftOutlook",
      "position": [
        1050,
        300
      ],
      "par...

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: 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-724fa590",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.827290",
    "updatedAt": "2025-09-29T07:07:48.827298",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "31a9f34c-c5b0-462e-885d-f394b6d83f3a",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        840,
        500
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "a16c48dd-070d-4d0b-b220-20a5e98288a6",
      "name": "Dataset 1",
      "type": "n8n-nodes-base.code",
      "position": [
        1060,
        360
      ],
      "parameters": {
        "jsCode": " return [\n{\n\"fruit\": \"apple\",\n\"color\": \"green\",\n},\n{\n\"fruit\": \"orange\",\n\"color\": \"orange\",\n},\n{\n\"fruit\": \"grape\",\n\"color\": \"green\",  \n},\n{\n\"fruit\": \"strawberry\",\n\"color\": \"red\",\n},\n{\n\"fruit\": \"banana\",\n\"color\": \"yellow\",\n}\n];\n"
      },
      "typeVersion": 2,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "11b41146-8682-4c8d-84db-259acddced4b",
      "name": "Dataset 2",
      "type": "n8n-nodes-base.code",
      "position": [
        1060,
        620
      ],
      "parameters": {
        "jsCode": " return [\n{\n\"fruit\": \"apple\",\n\"color\": \"green\",\n},\n{\n\"fruit\": \"grape\",\n\"color\": \"purple\",\n},\n{\n\"fruit\": \"orange\",\n\"color\": \"orange\",\n},\n{\n \"fruit\": \"kiwi\",\n \"color\": \"mostly green\"\n},\n{\n\"fruit\": \"banana\",\n\"color\": \"yellow\",\n}\n];\n"
      },
      "typeVersion": 2,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "dc976f9e-e645-...

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: 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-264dd89f",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:48.839316",
    "updatedAt": "2025-09-29T07:07:48.839344",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "ef32b2b5-9739-4622-aa50-ac9e6a93c43c",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        720,
        360
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "d39d67b6-3f3c-4296-affc-cfc786b877c3",
      "name": "Show 16 random products",
      "type": "n8n-nodes-base.mySql",
      "position": [
        900,
        360
      ],
      "parameters": {
        "query": "SELECT * from products\nORDER BY RAND()\nLIMIT 16;",
        "options": {},
        "operation": "executeQuery"
      },
      "credentials": {
        "mySql": {
          "id": "EEPqCgKBDiRRZ3ua",
          "name": "db4free MySQL"
        }
      },
      "typeVersion": 2.1,
      "notes": "This mySql node performs automated tasks as part of the workflow."
    },
    {
      "id": "8ca3e11c-d1b0-4ee6-94f0-b16c46b804d7",
      "name": "Define file structure",
      "type": "n8n-nodes-base.set",
      "position": [
        1120,
        200
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "Product.Code",
              "value": "={{ $json.productCode }}"
            },
            {
              "name": "Product.Name",
              "value": "={{ $json.productName }}"
            },
            {
              "name": "Product.Line",
              "value": "={{ $json.productLine }}"
            },
            {
              "name": "Product.Scale",
              "value": "={{ $json.product...

Output:
In node 'Convert to XML', the parameter 'mode' contains an expression that references undefined data.

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

**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 'Convert to XML' parameter 'mode'.