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-2e964e8f",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:52.841361",
    "updatedAt": "2025-09-29T07:07:52.841379",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "f4570aad-db25-4dcd-8589-b1c8335935de",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        200,
        2800
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "92aae60e-5fcd-4588-9a41-92e7c1b7f2ff",
      "name": "SERP results",
      "type": "n8n-nodes-base.set",
      "position": [
        1286,
        2800
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "b3e662aa-7ace-45ca-815a-0ad1d65ef7a0",
              "name": "organicResults",
              "type": "array",
              "value": "={{ $json.result.organicResults }}"
            },
            {
              "id": "ac655bf2-181f-4117-a7d6-aa4ec2738bd9",
              "name": "peopleAlsoAsk",
              "type": "array",
              "value": "={{ $json.result.peopleAlsoAsk }}"
            },
            {
              "id": "9e045f00-006e-4b8b-863d-cb25d682b69d",
              "name": "searchQuery",
              "type": "string",
              "value": "={{ $json.result.searchQuery.term }}"
            },
            {
              "id": "08c1f92b-deac-4951-863f-721e0714739b",
              "name": "paidAds",
              "type": "string",
              "value": "={{ $json.result.paidResults }}"
            }
          ]
        }
      },
      "notesInFlow": true,
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as par...

Output:
In node 'Split out Keywords', the parameter 'fieldToSplitOut' contains an expression that references undefined data.

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

**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 'Split out Keywords' parameter 'fieldToSplitOut'.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-a4ef417a",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:52.827392",
    "updatedAt": "2025-09-29T07:07:52.827405",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "dd9e2f9c-225a-4b6b-9904-293206a477e4",
      "name": "Get advice articles from a Google search",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1040,
        360
      ],
      "parameters": {
        "url": "{{ $env.BASE_URL }}",
        "options": {
          "batching": {
            "batch": {
              "batchSize": 25
            }
          }
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "0e2bcaeb-65a0-400a-a15e-0840723d8144",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        980,
        320
      ],
      "parameters": {
        "color": 2,
        "width": 621.7044818991839,
        "height": 566.8592254014303,
        "content": "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## 1. Get advice articles from a Google search**\nUses an HTTP request to perform a Google search for LinkedIn advice articles based on a predefined query.\n\n## 2. Extract Article links for LinkedIn advice articles\nThis Code node extracts LinkedIn article URLs from the Google search results by using a regular expression. It pulls all article links related to LinkedIn advice.\n\n## 3. Split Out all links for LinkedIn advice articles\nSplits the list of extracted LinkedIn article links into individual items. This allows each article to be processed one at a time in the following steps.\n"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "68eefc93-6c82...

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: Empty Input Handling

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-a0e6a2c8",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:52.829658",
    "updatedAt": "2025-09-29T07:07:52.829673",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "f4570aad-db25-4dcd-8589-b1c8335935de",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        480,
        1800
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "1c1be9d6-3fd5-44c2-a7dd-d291b9efe65b",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -260,
        1360
      ],
      "parameters": {
        "color": 4,
        "width": 657.3293805248016,
        "height": 843.3412992154545,
        "content": "## Generate SEO Keyword Search Volume Data using Google API\n\n## Use Case\nGenerate accurate search volume data for SEO keyword research:\n- You have a list of potential keywords to target for your website SEO but don't know their actual search volume\n- You need historical data to identify seasonal trends in keyword popularity\n- You want to assess keyword difficulty to prioritize your content strategy\n- You need data-driven insights for planning your SEO campaigns\n\n## What this Workflow Does\nThe workflow connects to Google's Keyword Planner API to retrieve keyword metrics for your SEO research:\n\n- Fetches monthly search volume for each keyword\n- Provides historical trends data for the past 12 months\n- Calculates keyword difficulty scores\n- Delivers competition metrics from Google Ads\n\n\n## Setup\n1. Fill the `Set 20 Keywords` with up to 20 Keywords of your choosing in an array e.g. [\"keyword 1\", \"keyword 2\",...]\n2. Create a Google Ads ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-7c6a6210",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:52.862889",
    "updatedAt": "2025-09-29T07:07:52.862901",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "6325369f-5881-4e4e-b71b-510a64b236ef",
      "name": "Retrieve relevant info",
      "type": "n8n-nodes-base.set",
      "position": [
        1260,
        400
      ],
      "parameters": {
        "mode": "raw",
        "options": {},
        "jsonOutput": "={\n\"track\" : \"{{ $json.track.name.replaceAll('\"',\"'\") }}\",\n\"artist\":  \"{{ $json.track.artists[0].name }}\",\n\"album\" :\"{{ $json.track.album.name }}\",\n\"track_spotify_uri\" : \"{{ $json.track.uri }}\",\n\"track_spotify_id\" : \"{{ $json.track.id }}\",\n\"external_urls\": \"{{ $json.track.external_urls.spotify }}\",\n\"track_popularity\"  : \"{{ $json.track.popularity }}\",\n\"album_release_date\" : \"{{ $json.track.album.release_date.toDateTime().year }}\"\n}"
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "2252fe16-6ee7-4fbe-b74e-d9bdcc7ad708",
      "name": "Batch preparation",
      "type": "n8n-nodes-base.code",
      "position": [
        1560,
        280
      ],
      "parameters": {
        "jsCode": "const items = $input.all();\nconst trackSpotifyIds = items.map((item) => item?.json?.track_spotify_id);\n\nconst aggregatedItems = [];\nfor (let i = 0; i < trackSpotifyIds.length; i += 100) {\n  aggregatedItems.push({\n    json: {\n      trackSpotifyIds: trackSpotifyIds.slice(i, i + 100),\n    },\n  });\n}\n\nreturn aggregatedItems;\n"
      },
      "typeVersion": 2,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "83c181f8-ed18-41d7-8c7e-26b0dd320083",
      "name": "Get Track...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-22b6c420",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:52.860174",
    "updatedAt": "2025-09-29T07:07:52.860188",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "11abe711-000c-4960-9f07-4e124532ba83",
      "name": "create_folder",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        20,
        440
      ],
      "parameters": {
        "name": "={{ $('topic_variables').item.json.Title }}",
        "driveId": {
          "__rl": true,
          "mode": "list",
          "value": "My Drive"
        },
        "options": {},
        "folderId": {
          "__rl": true,
          "mode": "list",
          "value": "root",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "/ (Root folder)"
        },
        "resource": "folder"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "MHcgKR744VHXSe3X",
          "name": "Drive n8n"
        }
      },
      "typeVersion": 3,
      "notes": "This googleDrive node performs automated tasks as part of the workflow."
    },
    {
      "id": "8198bcdb-3082-43d8-84aa-77e292b56e05",
      "name": "input_brief",
      "type": "n8n-nodes-base.set",
      "position": [
        1040,
        440
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "eff28505-c438-4c44-8db4-188797b1e5f3",
              "name": "content",
              "type": "string",
              "value": "={{ $('create_outline').item.json.message.content }}"
            }
          ]
        }
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "9b2be845-91c5-4fa8-9007-c0cee4058ddd",
      "name": "new_lines...

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:
{
  "nodes": [
    {
      "id": "c3ef40df-084e-435c-9a11-3aa0a2f94f36",
      "name": "When clicking \"Test workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        740,
        520
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "e0583472-a450-4582-83bc-84a014bea543",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        1640,
        520
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "output.results"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "b8aa573d-5b63-4669-900f-bcc915b6ad41",
      "name": "Save to Google Sheets",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1900,
        520
      ],
      "parameters": {
        "columns": {
          "value": {},
          "schema": [
            {
              "id": "name",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "name",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "price",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "price",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "availability",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "availability",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "imag...

Output:
The node 'Jina Fetch' 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 'Jina Fetch'.


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": "d73e5113-119f-4e62-9872-48e6a971d760",
      "name": "Stop Interview?",
      "type": "n8n-nodes-base.if",
      "position": [
        3380,
        920
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "3cf788a6-94d0-4223-9caa-30b8e4df8e01",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $json.output.stop_interview }}",
              "rightValue": ""
            }
          ]
        }
      },
      "typeVersion": 2.2,
      "notes": "This if node performs automated tasks as part of the workflow."
    },
    {
      "id": "cda3c487-97fa-4037-b9a0-0802f4a02727",
      "name": "Generate Row",
      "type": "n8n-nodes-base.set",
      "position": [
        3740,
        1200
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "06146a75-b67a-42cf-aa6f-241f23c47b9a",
              "name": "timestamp",
              "type": "string",
              "value": "={{ $now.toISO() }}"
            },
            {
              "id": "b0278c64-58a7-487d-b7ba-d102fb5d4a0c",
              "name": "type",
              "type": "string",
              "value": "next_question"
            },
            {
              "id": "ba034ca1-408e-422f-b071-dab0ef12fb48",
              "name": "question",
              "type": "string",
              "value": "={{ $('Parse Response').item.json.output.question }}"
            },
            {
              "id": "a2231f6e-f507-408e-b598-53888cf8d4b5",
              "name": "answer",
              "type": "st...

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

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

### 🚨 Set Interview Topic 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: Empty Input Handling

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-3653027a",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:52.913515",
    "updatedAt": "2025-09-29T07:07:52.913642",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "Import Productboard Notes, Companies and Features into Snowflake",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "adcb71e4-880b-4c19-acbb-0708ae4af95f",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        5620,
        1440
      ],
      "parameters": {
        "color": 5,
        "width": 442.66083354762577,
        "height": 155.09952210536395,
        "content": "## Preview Slack Message\n:productboard: Weekly Update in :snowflake_logo: Completed\n27 new insights added in the last 7 days.\n88 insights remain unprocessed.\nYou can view the updated :metabase: dashboard below:\n<link metabase>\n"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "8a590e59-cbcd-43f3-a0de-7c1391661fcf",
      "name": "Manual mapping feature",
      "type": "n8n-nodes-base.set",
      "position": [
        4380,
        -180
      ],
      "parameters": {
        "fields": {
          "values": [
            {
              "name": "feature_id",
              "stringValue": "={{ $json.id }}"
            },
            {
              "name": "feature_name",
              "stringValue": "={{ $json.name }}"
            },
            {
              "name": "feature_status",
              "stringValue": "={{ $json.status.name }}"
            },
            {
              "name": "feature_start_date",
              "stringValue": "={{ $json.timeframe.startDate }}"
            },
            {
              "name": "fea...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-9a3c5ed9:
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:52.944226",
    "updatedAt": "2025-09-29T07:07:52.944238",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "201ef455-2d65-4563-8ec1-318211b1fa6a",
      "name": "Get Message Contents",
      "type": "n8n-nodes-base.gmail",
      "position": [
        2080,
        500
      ],
      "webhookId": "fa1d496f-17fa-4e50-bae9-84ca85ed4502",
      "parameters": {
        "simple": false,
        "options": {},
        "messageId": "={{ $json.id }}",
        "operation": "get"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "Sf5Gfl9NiFTNXFWb",
          "name": "Gmail account"
        }
      },
      "typeVersion": 2.1,
      "notes": "This gmail node performs automated tasks as part of the workflow."
    },
    {
      "id": "ded010af-e977-4c47-87dd-8221d601af74",
      "name": "Simplify Emails",
      "type": "n8n-nodes-base.set",
      "position": [
        2240,
        500
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "2006c806-42db-4457-84c2-35f59ed39018",
              "name": "date",
              "type": "string",
              "value": "={{ $json.date }}"
            },
            {
              "id": "872278d2-b97c-45ba-a9d3-162f154fe7dc",
              "name": "subject",
              "type": "string",
              "value": "={{ $json.subject }}"
            },
            {
              "id": "282f03e9-1d0f-4a17-b9ed-75b44171d4ee",
              "name": "text",
              "type": "string",
              "value": "={{ $json.text }}"
            },
            {
              "id": "9421776c-ff53-4490-b0e1-1e610534ba25",
              "name": "from",
              "type": "string",
   ...

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:
{
  "nodes": [
    {
      "id": "ec2683b4-06ae-4255-bf20-b6c5850f4fc5",
      "name": "Parse Webhook",
      "type": "n8n-nodes-base.set",
      "position": [
        -480,
        1100
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "e63f9299-a19d-4ba1-93b0-59f458769fb2",
              "name": "response",
              "type": "object",
              "value": "={{ $json.body.payload }}"
            }
          ]
        }
      },
      "typeVersion": 3.3,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "bb178ce9-3177-433e-a877-3635be7c3705",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -820,
        740
      ],
      "parameters": {
        "color": 7,
        "width": 466.8168310000617,
        "height": 567.6433222116042,
        "content": "![Imgur]({{ $env.WEBHOOK_URL }}\n## Events Webhook Trigger\nThe first node receives all messages from Slack API via Subscription Events API. You can find more information about setting up the subscription events API by [clicking here]({{ $env.API_BASE_URL }} \n\nThe second node extracts the payload from slack into an object that n8n can understand.  "
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "04d35926-1c7d-406b-90f1-9641680cb3b7",
      "name": "Sticky Note15",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -340,
        420
      ],
      "parameters": {
        "color": 7,
        "width": 566.0553219408072,
        "height": 1390.6748140207737,
        "content": "![n8n]({{ $env.WEBHOOK_URL }}\n## Efficient Slack Interaction Handling with n8n\n\nThis section of the workflow is designed to efficiently manage and route messages and submissions from Slack based on specific triggers and condition...

Output:
The node 'Post Image to Channel' (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": {
    "id": "GjRorC99RZt4Wnrp",
    "name": "Image Upload Bot"
  }
}
```

**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 'Post Image to Channel' node.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "a4c46baf-ff6d-489f-9c77-a5e4cfe6b580",
      "name": "Fetch Github Repo Releases",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        640,
        240
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "options": {}
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "aba391ad-eedc-4cf7-a770-646eba11e3fe",
      "name": "Split Out Content",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        1100,
        140
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "body"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "ea29ed9d-5b34-46f2-87c6-2bacf4b7d7bf",
      "name": "Convert Markdown to HTML",
      "type": "n8n-nodes-base.markdown",
      "position": [
        1280,
        140
      ],
      "parameters": {
        "mode": "markdownToHtml",
        "options": {},
        "markdown": "={{ $json.body }}",
        "destinationKey": "YOUR_CREDENTIAL_HERE"
      },
      "typeVersion": 1,
      "notes": "This markdown node performs automated tasks as part of the workflow."
    },
    {
      "id": "53bf597d-3f64-4375-9632-c8aed38e88df",
      "name": "Daily Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        380,
        240
      ],
      "parameters": {
        "rule": {
          "interval": [
            {}
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "This scheduleTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "14bf72aa-167b-44e4-ba6c-f20f1c366b93",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        540,
        140
      ],
      "parameters": {
        "width": 288,
        "height": 300,
     ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-93ae74d6",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.007168",
    "updatedAt": "2025-09-29T07:07:53.007224",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "266ebce9-540d-4fd8-95c2-2799f0eff8d9",
      "name": "Get Base Schema",
      "type": "n8n-nodes-base.airtable",
      "position": [
        420,
        160
      ],
      "parameters": {
        "base": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $json.BaseId }}"
        },
        "resource": "base",
        "operation": "getSchema"
      },
      "credentials": {
        "airtableTokenApi": {
          "id": "Und0frCQ6SNVX3VV",
          "name": "Airtable Personal Access Token account"
        }
      },
      "typeVersion": 2.1,
      "notes": "This airtable node performs automated tasks as part of the workflow."
    },
    {
      "id": "1c33d0db-6eac-4638-8b5e-867ec52abd11",
      "name": "On form submission",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        80,
        160
      ],
      "webhookId": "a6daabfe-5507-4ac1-9345-45a59ba67630",
      "parameters": {
        "options": {
          "path": "airtable-n8n-form",
          "ignoreBots": true
        },
        "formTitle": "Airtable to n8n Form",
        "formFields": {
          "values": [
            {
              "fieldType": "dropdown",
              "fieldLabel": "BaseId",
              "fieldOptions": {
                "values": [
                  {
                    "option": "appfP15Xd0aVZR9xV"
                  }
                ]
              },
              "requiredField": true
            },
            {
              "fieldType": "dropdown",
              "fieldLabel": "TableId",
              "fieldOptions": {
                "values": [
                  {
        ...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "8e3f167d-cbeb-4f7f-a867-c356d2dca9d0:
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        1580,
        240
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "rows"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "19370d12-f6de-44a1-91a6-da097abdf7de",
      "name": "Edit Fields",
      "type": "n8n-nodes-base.set",
      "position": [
        1780,
        240
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "7343c80f-37f3-4bb5-84d8-9f21f8a350cd",
              "name": "Keyword",
              "type": "string",
              "value": "={{ $json.keys[0] }}"
            },
            {
              "id": "436e7c8b-2df2-40a9-97af-597dc00cf143",
              "name": "clicks",
              "type": "number",
              "value": "={{ $json.clicks }}"
            },
            {
              "id": "5b4aaffe-391a-4c9d-8249-f447397a3f5d",
              "name": "impressions",
              "type": "number",
              "value": "={{ $json.impressions }}"
            },
            {
              "id": "33677237-57fe-48f4-aff8-72ae81b5f5a2",
              "name": "ctr",
              "type": "number",
              "value": "={{ $json.ctr }}"
            },
            {
              "id": "f961deee-d222-4df7-a7ff-b7286405e4a7",
              "name": "position",
              "type": "number",
              "value": "={{ $json.position }}"
            }
          ]
        }
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "9eae4908-5266-439c-a66b-5679036234de",
      "name": "Split Out1",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        1580,
        440
      ],...

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": [
    {
      "id": "c17e444e-0a5e-4bfe-8de6-c3185de4465d",
      "name": "Grants to List",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        -240,
        -180
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "oppHits"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "9251d39c-6098-42fa-aadd-3a22464dee64",
      "name": "Get Grant Details",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        280,
        -280
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "method": "POST",
        "options": {},
        "sendBody": true,
        "contentType": "form-urlencoded",
        "bodyParameters": {
          "parameters": [
            {
              "name": "oppId",
              "value": "={{ $json.id }}"
            }
          ]
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part of the workflow."
    },
    {
      "id": "ade994d6-a1f8-45bf-a82e-83eb38da08d6",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        440,
        -120
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "4d81b20e-0038-48d3-840c-3fcf8b798a0d",
      "name": "Summarize Synopsis",
      "type": "n8n-nodes-base.noOp",
      "position": [
        460,
        -280
      ],
      "parameters": {
        "text": "=Agency: {{ $json.synopsis.agencyName }}\nTitle: {{ $json.opportunityTitle }}\nSynopsis: {{ $json.synopsis.synopsisDesc }}",
        "options": {
          "systemPromptTemplate": "You've bee...

Output:
The node 'Everyday @ 9am' 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 'Everyday @ 9am'.


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": [
    {
      "id": "82fd6023-2cc3-416e-83b7-fda24d07d77a",
      "name": "Issues to List",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        40,
        -100
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "data.issues.nodes"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "9cc77786-e14f-47c6-a3cf-60c2830612e6",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        360,
        80
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "821d4a60-81a4-4915-9c13-3d978cc0114b",
      "name": "Combine Sentiment Analysis",
      "type": "n8n-nodes-base.set",
      "position": [
        700,
        -80
      ],
      "parameters": {
        "mode": "raw",
        "options": {},
        "jsonOutput": "={{\n{\n  ...$('Issues to List').item.json,\n  ...$json.output\n}\n}}"
      },
      "typeVersion": 3.4,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "fe6560f6-2e1b-4442-a2af-bd5a1623f213",
      "name": "Sentiment over Issue Comments",
      "type": "n8n-nodes-base.noOp",
      "position": [
        360,
        -80
      ],
      "parameters": {
        "text": "={{\n$json.comments.nodes.map(node => [\n  `${node.user.displayName} commented on ${node.createdAt}:`,\n   node.body\n].join('\\n')).join('---\\n')\n}}",
        "options": {},
        "attributes": {
          "attributes": [
            {
              "name": "sentiment",
              "required": true,
              "description": "One of positive, negative or neutral"
 ...

Output:
The node 'Fetch Active Linear Issues' 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 'Fetch Active Linear Issues'.


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

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

Workflow JSON:
{
  "nodes": [
    {
      "id": "d3159589-dbb7-4cca-91f5-09e8b2e4cba8",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        240,
        500
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "b4b42b3f-ef30-4fc8-829d-59f8974c4168",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        2180,
        700
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "032c3012-ed8d-44eb-94f0-35790f4b616f",
      "name": "OpenAI Chat Model1",
      "type": "n8n-nodes-base.noOp",
      "position": [
        2980,
        460
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "bf922785-7e8f-4f93-bfff-813c16d93278",
      "name": "OpenAI Chat Model2",
      "type": "n8n-nodes-base.noOp",
      "position": [
        2020,
        520
      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "8gccIjcuf3gvaoEr",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "d8d4b26f-270f-4b39-a4cd-a6e4361da591",
      "name": "Extract Voice Characteristics",
      "type": "n8n-nodes-base.no...

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: 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": "41183066-0045-4a75-ba23-42f4efcfeccc",
      "name": "Google Gemini Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        720,
        720
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-1.5-flash"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "Hx1fn2jrUvojSKye",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatGoogleGemini node performs automated tasks as part of the workflow."
    },
    {
      "id": "eb061c39-7a4d-42e7-bb42-806504731b11",
      "name": "Basic LLM Chain",
      "type": "n8n-nodes-base.noOp",
      "position": [
        700,
        560
      ],
      "parameters": {
        "text": "=Your Task is to find the best resources to learn {{ $('GetTopicFromToLearn').item.json[\"I want to learn\"] }}. \n\nI have scraped the HackerNews and The following is the list of comments from HackerNews on topic about Learning {{ $('GetTopicFromToLearn').item.json[\"I want to learn\"] }}\n\n\nFocus only on comments that provide any resouces or advice or insight about learning {{ $('GetTopicFromToLearn').item.json.Learn }}. Ignore all other comments that are off topic discussions.\n\nNow based on these comments, you need to find the top resources and list them. \n\nCategorize them based on resource type (course, book, article, youtube videos, lectures, etc) and also figure out the difficultiy level (beginner, intermediate, advanced, expert).\n\nYou don't always to have fill in these categories exactly, these are given here for reference. Use your intution to find the best categorization.\n\nNow based on these metrics and running a basic sentiment analysis on comments you need to figure out what the top resources are. \n\nRespond back in Markdown formatted text. In the following format\n\n**OUTPUT FORMAT**\n\n```\n\n## Top HN Recomended Resources To Learn <topic 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.

Add rate limiting protection with Wait nodes and retry logic.


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-1e8bd270",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.048976",
    "updatedAt": "2025-09-29T07:07:53.049027",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "ff4e8706-09a0-4bf1-86c1-dfb65f55ccb3",
      "name": "Google Drive Trigger",
      "type": "n8n-nodes-base.googleDriveTrigger",
      "position": [
        20,
        -140
      ],
      "parameters": {
        "event": "fileCreated",
        "options": {},
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        },
        "triggerOn": "specificFolder",
        "folderToWatch": {
          "__rl": true,
          "mode": "list",
          "value": "1-hRMnBRYgY6iVJ_youKMyPz83k9GAVYu",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "nnnnnnnnnnn8n"
        }
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "PlyNQuMqlwn9SuLb",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 1,
      "notes": "This googleDriveTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "340fb03b-3b8a-4eb4-ad4c-b0ba12b72b19",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        260,
        -140
      ],
      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $json.id }}"
        },
        "options": {
          "binaryPropertyName": "data"
        },
        "operation": "download"
      },
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "PlyNQuMqlwn9SuLb",
          "name": "Google Drive account"
        }
      },
      "typeVersion": 3,
      "notes": "This googleDrive node performs automated t...

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

**Faulty Expression**: `={{ $items[999].json.value }}`
**Original Value**: `## Remove PII from CSV Files
This workflow monitors a Google Drive folder for new CSV files, identifies and removes PII columns using OpenAI, and uploads the sanitized file back to the drive. It requires Google Drive and OpenAI integrations with API access enabled.`

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

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

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


Instruction:
Debug this n8n workflow. It has the following issue:
Error Type: 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": [
    {
      "id": "065d7ec9-edc5-46f6-b8ac-d62ed0e5c8e3",
      "name": "Baserow Event",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -1180,
        -140
      ],
      "webhookId": "267ea500-e2cd-4604-a31f-f0773f27317c",
      "parameters": {
        "path": "267ea500-e2cd-4604-a31f-f0773f27317c",
        "options": {},
        "httpMethod": "POST"
      },
      "typeVersion": 2,
      "notes": "This webhook node performs automated tasks as part of the workflow."
    },
    {
      "id": "ac1403b4-9d45-404d-9892-0bed39b9ec82",
      "name": "Event Type",
      "type": "n8n-nodes-base.switch",
      "position": [
        -220,
        -140
      ],
      "parameters": {
        "rules": {
          "values": [
            {
              "outputKey": "YOUR_CREDENTIAL_HERE",
              "conditions": {
                "options": {
                  "version": 2,
                  "leftValue": "",
                  "caseSensitive": true,
                  "typeValidation": "strict"
                },
                "combinator": "and",
                "conditions": [
                  {
                    "id": "2162daf8-d23d-4b8f-8257-bdfc5400a3a8",
                    "operator": {
                      "name": "filter.operator.equals",
                      "type": "string",
                      "operation": "equals"
                    },
                    "leftValue": "={{ $json.event_type }}",
                    "rightValue": "rows.updated"
                  }
                ]
              },
              "renameOutput": true
            },
            {
              "outputKey": "YOUR_CREDENTIAL_HERE",
              "conditions": {
                "options": {
                  "version": 2,
                  "leftValue": "",
                  "caseSensitive": true,
                  "typeValidation": "strict"
                },
                "combinator": "and",
                "conditions": [
              ...

Output:
The node 'Sticky Note13' has a data type mismatch in its parameters.

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

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

**Solutions**:

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

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

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

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

Fix data type conversion in 'Sticky Note13'.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-227fa03b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.076421",
    "updatedAt": "2025-09-29T07:07:53.076429",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "86ddd018-3d6b-46b9-aa93-dedd6c6b5076",
      "name": "When chat message received",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -880,
        360
      ],
      "webhookId": "a9668bb8-bbe8-418a-b5c9-ff7dd431244f",
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.1,
      "notes": "This chatTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "a5ba5090-8e3b-4408-82df-92d2c524039e",
      "name": "AI Agent",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -680,
        360
      ],
      "parameters": {
        "options": {
          "systemMessage": "You are a cybersecurity expert trained on MITRE ATT&CK and enterprise incident response. Your job is to:\n1. Extract TTP information from SIEM data.\n2. Provide actionable remediation steps tailored to the alert.\n3. Cross-reference historical patterns and related alerts.\n4. Recommend external resources for deeper understanding.\n\nEnsure that:\n- TTPs are tagged with the tactic, technique name, and technique ID.\n- Remediation steps are specific and actionable.\n- Historical data includes related alerts and notable trends.\n- External links are relevant to the observed behavior.\n"
        }
      },
      "typeVersion": 1.7,
      "notes": "This agent node performs automated tasks as part of the workflow."
    },
    {
      "id": "67c52944-b616-4ea6-9507-e9fb6fcdbe2b",
      "name": "OpenAI Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        -740,
        580
      ],
      "parameters": {
        "model": "gpt-4o",
        "options"...

Output:
The node 'Qdrant Vector Store query' (type: n8n-nodes-base.noOp) 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": {
  "qdrantApi": {
    "id": "u0qre50aar6iqyxu",
    "name": "Angel MitreAttack Demo Cluster"
  }
}
```

**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 'Qdrant Vector Store query' node.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-655452ac",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.074168",
    "updatedAt": "2025-09-29T07:07:53.074176",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "dd049dd7-3f85-4c36-a4ec-d5df856fed14",
      "name": "Notion Trigger",
      "type": "n8n-nodes-base.notionTrigger",
      "position": [
        -100,
        360
      ],
      "parameters": {
        "event": "pagedUpdatedInDatabase",
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        },
        "databaseId": {
          "__rl": true,
          "mode": "list",
          "value": "f50f830b-cadd-4d9c-9a38-bb22e284193e",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "Journal"
        }
      },
      "credentials": {
        "notionApi": {
          "id": "C26NOhx95lnHIdzV",
          "name": "Notion account"
        }
      },
      "typeVersion": 1,
      "notes": "This notionTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "4bedb493-7a17-4d3f-8b00-93d7134e74ca",
      "name": "Notion",
      "type": "n8n-nodes-base.notion",
      "position": [
        320,
        220
      ],
      "parameters": {
        "blockId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $json.id }}"
        },
        "resource": "block",
        "operation": "getAll",
        "returnAll": true
      },
      "credentials": {
        "notionApi": {
          "id": "C26NOhx95lnHIdzV",
          "name": "Notion account"
        }
      },
      "typeVersion": 2.2,
      "notes": "This notion node performs automated tasks as part of the workflow."
    },
    {
      "id": "8994422e-8b71-4638-be36-d105557a20d8",
      "name": "Notion Node Blocks to Md",...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-683b1b22",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.106657",
    "updatedAt": "2025-09-29T07:07:53.106678",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "cbc036f7-b0e1-4eb4-94c3-7571c67a1efe",
      "name": "Code",
      "type": "n8n-nodes-base.code",
      "position": [
        -120,
        40
      ],
      "parameters": {
        "mode": "runOnceForEachItem",
        "jsCode": "// Get the input text\nconst text = $input.item.json.text;\n\n// Ensure text is not null or undefined\nif (!text) {\n  throw new Error('Input text is empty');\n}\n\n// Function to split text into sentences while preserving dates and list items\nfunction splitIntoSentences(text) {\n  const monthNames = '(?:Januar|Februar|M\u00e4rz|April|Mai|Juni|Juli|August|September|Oktober|November|Dezember)';\n  const datePattern = `(?:\\\\d{1,2}\\\\.\\\\s*(?:${monthNames}|\\\\d{1,2}\\\\.)\\\\s*\\\\d{2,4})`;\n  \n  // Split by sentence-ending punctuation, but not within dates or list items\n  const regex = new RegExp(`(?<=[.!?])\\\\s+(?=[A-Z\u00c4\u00d6\u00dc]|$)(?!${datePattern}|\\\\s*[-\u2022]\\\\s)`, 'g');\n  \n  return text.split(regex)\n    .map(sentence => sentence.trim())\n    .filter(sentence => sentence !== '');\n}\n\n// Split the text into sentences\nconst sentences = splitIntoSentences(text);\n\n// Output a single object with an array of sentences\nreturn { json: { sentences: sentences } };"
      },
      "typeVersion": 2,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "faae4740-a529-4275-be0e-b079c3bfde58",
      "name": "Split Out1",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        340,
        -180
      ],
      "parameters": {
        "options": {
          "destinationFieldName": "claim"
        },...

Output:
The node 'Basic LLM Chain' 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 'Basic LLM Chain'.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-c3d97436",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.109720",
    "updatedAt": "2025-09-29T07:07:53.109729",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "c8481fc0-4cc2-4662-b008-e81eaeb4840b",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        -340,
        0
      ],
      "parameters": {
        "simple": false,
        "filters": {
          "sender": "ray.thomas@charter.com",
          "readStatus": "unread"
        },
        "options": {
          "downloadAttachments": true,
          "dataPropertyAttachmentsPrefixName": "attachment_"
        },
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "egorWvqjkdIG2ovh",
          "name": "Gmail account - rthomascharter"
        }
      },
      "typeVersion": 1.2,
      "notes": "This gmailTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "fd82d244-dfab-46db-af8e-e674501db75d",
      "name": "Google Drive",
      "type": "n8n-nodes-base.googleDrive",
      "position": [
        540,
        0
      ],
      "parameters": {
        "name": "={{ $binary.values()[0].fileName }}",
        "driveId": {
          "__rl": true,
          "mode": "list",
          "value": "My Drive"
        },
        "options": {},
        "folderId": {
          "__rl": true,
          "mode": "list",
          "value": "0BwqhgrfUUaOuM2x1NXhxLUlGVEE",
          "cachedResultUrl": "{{ $env.WEBHOOK_URL }}",
          "cachedResultName": "misc"
        },
        "inputDataFieldName": "={{ $binary.keys()[0] }}"
      },
      "typeVersion": 3,
      "notes": "This googleDrive node performs a...

Output:
The node 'Google Drive' (type: n8n-nodes-base.googleDrive) requires credentials but the 'credentials' configuration is missing.

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "googleDriveOAuth2Api": {
    "id": "fwkvLJni8GfLNqBZ",
    "name": "Google Drive account - rthomascharter"
  }
}
```

**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 Drive' node.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-d32701c9",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.108403",
    "updatedAt": "2025-09-29T07:07:53.108411",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "95c798a4-bc34-4219-b7c3-6b4a4070886b",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -320,
        1080
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "09987590-1ec2-48d4-aa04-32b85addd9e6",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        420,
        1080
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "newsTitle"
      },
      "typeVersion": 1,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "758e3f60-01dc-46c7-bb53-7460eaed92e3",
      "name": "Extract News Block",
      "type": "n8n-nodes-base.html",
      "position": [
        220,
        1080
      ],
      "parameters": {
        "options": {},
        "operation": "extractHtmlContent",
        "extractionValues": {
          "values": [
            {
              "key": "YOUR_CREDENTIAL_HERE",
              "cssSelector": ".eGcloy",
              "returnArray": true,
              "returnValue": "html"
            }
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "This html node performs automated tasks as part of the workflow."
    },
    {
      "id": "20440f9a-a40c-4419-af6d-383de041d078",
      "name": "Extract News Content",
      "type": "n8n-nodes-base.html",
      "position": [
        600,
        1080
      ],
      "parameters": {
        "options": {},
        "...

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: 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": "2DzQ1FH11S3Gp6wn",
  "meta": {
    "instanceId": "workflow-983a517b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.138441",
    "updatedAt": "2025-09-29T07:07:53.138485",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "YogiAI",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "2afc390e-d774-4db4-a52f-138f13837646",
      "name": "Azure OpenAI Chat Model2",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1040,
        0
      ],
      "parameters": {
        "model": "4o",
        "options": {
          "temperature": 0.8
        }
      },
      "credentials": {
        "azureOpenAiApi": {
          "id": "5AjoWhww5SQi2VXd",
          "name": "Azure Open AI account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatAzureOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "529d9ed9-3ae5-41cb-983e-874aa37ee1c7",
      "name": "YogaLog",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        2240,
        -100
      ],
      "parameters": {
        "columns": {
          "value": {
            "Date": "={{ $('Trigger 2130 YogaPosesToday').first().json.timestamp }}",
            "JSON": "={{ $('CombineAll').item.json.LineBody }}",
            "Text": "={{ $('RewritePosesToday').item.json.text }}"
          },
          "schema": [
            {
              "id": "Date",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Date",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Text",
              "type": "string",
              "display": true,
              "requ...

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

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

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

**Solutions**:

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-797a6228",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.118421",
    "updatedAt": "2025-09-29T07:07:53.118439",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "25fb4302-853a-421d-8e4f-4a18d723c4a0",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "disabled": true,
      "position": [
        -860,
        380
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "acb8e29a-75b8-4ccb-aca8-20d5a7053334",
      "name": "Gong",
      "type": "n8n-nodes-base.gong",
      "disabled": true,
      "position": [
        -440,
        120
      ],
      "parameters": {
        "filters": {
          "toDateTime": "={{ $now.toISO() }}",
          "fromDateTime": "={{ $now.minus({ days: 2 }).toISO() }}"
        },
        "options": {},
        "returnAll": true,
        "requestOptions": {}
      },
      "credentials": {
        "gongApi": {
          "id": "EchfvOC4rjw8MUkr",
          "name": "Liam Gong Cred"
        }
      },
      "typeVersion": 1,
      "notes": "This gong node performs automated tasks as part of the workflow."
    },
    {
      "id": "930a7fc9-64a1-4966-be0d-c58132b735e5",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -700,
        -60
      ],
      "parameters": {
        "color": 7,
        "width": 1080,
        "height": 920,
        "content": "## Get Gong Calls and Supporting Data\nBesides the phone calls, integration and competitor data is extracted to supplement the AI prompt with accurate data to compare against mispronunciations. "
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs...

Output:
The node 'Get list of Competitors' (type: n8n-nodes-base.notion) 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": {
  "notionApi": {
    "id": "{{ $credentials.notionApi.id }}",
    "name": "Notion david-internal"
  }
}
```

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

Add credentials configuration to the 'Get list of Competitors' node.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-0a893a9d",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.126429",
    "updatedAt": "2025-09-29T07:07:53.126438",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "e893e48c-1b69-413a-90d7-ad6ce5987e7c",
      "name": "Execute Workflow Trigger",
      "type": "n8n-nodes-base.executeWorkflowTrigger",
      "position": [
        -180,
        -60
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This executeWorkflowTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "1c42e95b-705d-43ae-91ce-1029334b9e9a",
      "name": "Retrieve detailed call data",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        60,
        40
      ],
      "parameters": {
        "url": "{{ $env.API_BASE_URL }}",
        "options": {
          "fullResponse": true
        },
        "requestMethod": "POST",
        "authentication": "{{ $credentials.genericCredentialType }}",
        "jsonParameters": true,
        "genericAuthType": "httpHeaderAuth",
        "bodyParametersJson": "={\n  \"contentSelector\": {\n    \"context\": \"Extended\",\n    \"contextTiming\": [\"Now\", \"TimeOfCall\"],\n    \"exposedFields\": {\n      \"collaboration\": {\n        \"publicComments\": true\n      },\n      \"content\": {\n        \"pointsOfInterest\": true,\n        \"structure\": true,\n        \"topics\": true,\n        \"trackers\": true\n      },\n      \"interaction\": {\n        \"personInteractionStats\": true,\n        \"questions\": true,\n        \"speakers\": true,\n        \"video\": true\n      },\n      \"media\": false,\n      \"parties\": true\n    }\n  },\n  \"filter\": {\n    \"callIds\": [\"{{ $json['calldata[0].calls'].id }}\"]\n  }\n}"
      },
      "credentials": {
        "httpHeaderAuth": {
          "id"...

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

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

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

**Solutions**:

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

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

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

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

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


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-85fcc410",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.143168",
    "updatedAt": "2025-09-29T07:07:53.143178",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "eec7d9b8-d1e3-4a43-9e0d-f6d750e736b5",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -640,
        -400
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "5276a2cf-3d42-409a-800d-9080aa5e1a09",
      "name": "Google Gemini Chat Model",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1820,
        -60
      ],
      "parameters": {
        "options": {},
        "modelName": "models/gemini-2.0-flash"
      },
      "credentials": {
        "googlePalmApi": {
          "id": "BB5B0v4OaFQeEt3C",
          "name": "Google Gemini(PaLM) Api account"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatGoogleGemini node performs automated tasks as part of the workflow."
    },
    {
      "id": "1b89dca9-1137-4e0f-b3ff-1b354152c128",
      "name": "AI Agent",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1880,
        -260
      ],
      "parameters": {
        "text": "={{ $('Loop Over Items').all() }}",
        "options": {
          "passthroughBinaryImages": true
        },
        "promptType": "define"
      },
      "typeVersion": 1.7,
      "notes": "This agent node performs automated tasks as part of the workflow."
    },
    {
      "id": "00348203-882f-48da-8127-e57cf30c5b20",
      "name": "Get image from unsplash2",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1160,
        -280
      ],
      "parameters": {
        ...

Output:
The node 'Call Gemini API with Image' (type: n8n-nodes-base.httpRequest) requires credentials but the 'credentials' configuration is missing.

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

**Solution**: Add the credentials configuration back to the node:
```json
"credentials": {
  "httpQueryAuth": {
    "id": "Eh1GI1UjOtJk4CDZ",
    "name": "Query Gemini Auth account"
  }
}
```

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

Add credentials configuration to the 'Call Gemini API with Image' node.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-5c1747cf",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.169047",
    "updatedAt": "2025-09-29T07:07:53.169069",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "My workflow 2",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
      "id": "1562791c-33a9-425c-a774-32e328bd4715",
      "name": "Token Request",
      "type": "n8n-nodes-base.httpRequest",
      "notes": "Get the token from Dartagnan that expires after 60 minutes",
      "position": [
        60,
        200
      ],
      "parameters": {
        "url": "{{ $env.WEBHOOK_URL }}",
        "method": "POST",
        "options": {
          "redirect": {
            "redirect": {}
          }
        },
        "sendBody": true,
        "bodyParameters": {
          "parameters": [
            {
              "name": "client_id",
              "value": "={{ $('Assign Credentials').item.json.client_id }}"
            },
            {
              "name": "client_secret",
              "value": "={{ $('Assign Credentials').item.json.client_secret }}"
            },
            {
              "name": "grant_type",
              "value": "client_credentials"
            }
          ]
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "2d81394c-9898-419a-a832-339e66d56a29",
      "name": "Assign Credentials",
      "type": "n8n-nodes-base.set",
      "position": [
        -400,
        300
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "debe5309-40f6-411d-8c4d-3b282cf1bba9",
              "name": "client_id",
              "type": "string",
              "value": "Enter your Dartagnan client_id"
            },
            {
              "id": "6028c0c...

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: 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-6a45f06b",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.173953",
    "updatedAt": "2025-09-29T07:07:53.173964",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "5d02237f-151b-4bb4-9341-b11149925309",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -980,
        -40
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "dc60bffa-b6f8-432d-85ed-0d08f092a454",
      "name": "Filter",
      "type": "n8n-nodes-base.filter",
      "position": [
        -20,
        -220
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "3b4c2e25-862d-4b4e-aa66-38c5f0e5a7b2",
              "operator": {
                "type": "string",
                "operation": "contains"
              },
              "leftValue": "={{ $json['urlset.url']['news:news']['news:title'] }}",
              "rightValue": "raise"
            }
          ]
        }
      },
      "typeVersion": 2.2,
      "notes": "This filter node performs automated tasks as part of the workflow."
    },
    {
      "id": "f779a004-57f6-451b-984b-3fd9517e4842",
      "name": "Structured Output Parser",
      "type": "n8n-nodes-base.noOp",
      "position": [
        1900,
        100
      ],
      "parameters": {
        "jsonSchemaExample": "{\n\t\"website_url\": \"{{ $env.WEBHOOK_URL }}\"\n}"
      },
      "typeVersion": 1.2,
      "notes": "...

Output:
The workflow has a broken data flow. The node 'c6082aa7-84ce-40ce-8372-a73163439a8f' is not connected to any subsequent nodes.

**Root Cause**: The connections object is missing the output connections for 'c6082aa7-84ce-40ce-8372-a73163439a8f'.

**Impact**: Data from 'c6082aa7-84ce-40ce-8372-a73163439a8f' 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 'c6082aa7-84ce-40ce-8372-a73163439a8f' 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": {
  "c6082aa7-84ce-40ce-8372-a73163439a8f": {
    "main": [[{"node": "NextNode", "type": "main", "index": 0}]]
  }
}
```

Reconnect 'c6082aa7-84ce-40ce-8372-a73163439a8f' 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-4a8706f6",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.157730",
    "updatedAt": "2025-09-29T07:07:53.157741",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "eb8bbb43-d6ca-48f9-9522-12ac7100961d",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -1360,
        380
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "77bf0c40-b045-40f9-9401-d1b206938180",
      "name": "Convert to File",
      "type": "n8n-nodes-base.convertToFile",
      "position": [
        -360,
        -420
      ],
      "parameters": {
        "options": {},
        "operation": "toJson",
        "binaryPropertyName": "=data"
      },
      "typeVersion": 1.1,
      "notes": "This convertToFile node performs automated tasks as part of the workflow."
    },
    {
      "id": "c2e870c2-52e8-4808-9091-e3dcf286eaa5",
      "name": "Split Out",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        -660,
        20
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "data"
      },
      "typeVersion": 1,
      "alwaysOutputData": true,
      "notes": "This splitOut node performs automated tasks as part of the workflow."
    },
    {
      "id": "2bcafdc1-94e0-4a3d-9ad5-a189973be980",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        -1500,
        -340
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "minutes",
              "minutesInterval": 15
            }
          ]
        }
      },
      "typeVersion": 1.2,
      "notes": "...

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

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

**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 'Write cache.json' parameter 'operation'.


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

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

Workflow JSON:
{
  "meta": {
    "instanceId": "workflow-5c235117",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:53.209648",
    "updatedAt": "2025-09-29T07:07:53.209657",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "nodes": [
    {
      "id": "33114dba-d3e2-469c-bb01-e50d4e84be53",
      "name": "When clicking \u2018Test workflow\u2019",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        120,
        60
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "68a92424-8345-40d1-bdb2-ad4b68c35406",
      "name": "Get Orders",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        500,
        0
      ],
      "parameters": {
        "url": "{{ $env.SHOPIFY_URL }}",
        "options": {
          "response": {
            "response": {
              "fullResponse": true
            }
          }
        },
        "sendQuery": true,
        "authentication": "{{ $credentials.predefinedCredentialType }}",
        "queryParameters": {
          "parameters": [
            {
              "name": "limit",
              "value": "250"
            },
            {
              "name": "fields",
              "value": "id,note,email,processed_at,customer"
            },
            {
              "name": "={{ $json.page_info ? \"page_info\" : \"status\" }}",
              "value": "={{ $json.page_info ? $json.page_info : 'any' }}"
            }
          ]
        },
        "nodeCredentialType": "={{ $json[\"non_existent_field\"] }}"
      },
      "credentials": {
        "shopifyAccessTokenApi": {
          "id": "vtyKGPLLdjc7MLea",
          "name": "Shopify Access Token account"
        }
      },
      "typeVersion": 4.2,
      "notes": "This httpRequest node performs automated tasks as part...

Output:
In node 'Get Orders', the parameter 'nodeCredentialType' contains an expression that references undefined data.

**Faulty Expression**: `={{ $json["non_existent_field"] }}`
**Original Value**: `YOUR_CREDENTIAL_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 'Get Orders' parameter 'nodeCredentialType'.