n8n - 💡(How to fix) Fix Dropbox Upload a file widget has stopped working [1 comments, 2 participants]

n8n2026-04-08 15:33:54

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n8n-io/n8n#28205•Fetched 2026-04-09 08:16:12

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graf1771

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graf1771

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Error Message

Describe the problem/error/question

What is the error message (if any)?

Error code 400 - "Error in call to API function "users/get_current_account": Bad HTTP "Content-Type" header: "application/x-www-form-urlencoded". Expecting one of "application/json", "application/json; charset=utf-8", "text/plain; charset=dropbox-cors-hack"."

error: all

Code Example

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)
⚠️ WARNING ⚠️ If you have sensitive data in your workflow (like API keys), please remove it before sharing.

{
  "nodes": [
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "weeks",
              "triggerAtDay": [
                0,
                4
              ],
              "triggerAtMinute": 10
            }
          ]
        }
      },
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.2,
      "position": [
        0,
        0
      ],
      "id": "88a764c5-5b4f-466c-a0c0-29b558be0955",
      "name": "Schedule Trigger"
    },
    {
      "parameters": {
        "documentId": {
          "__rl": true,
          "value": "1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk",
          "mode": "list",
          "cachedResultName": "Passebo_articles",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk/edit?usp=drivesdk"
        },
        "sheetName": {
          "__rl": true,
          "value": "gid=0",
          "mode": "list",
          "cachedResultName": "Sheet1",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk/edit#gid=0"
        },
        "filtersUI": {
          "values": [
            {
              "lookupColumn": "production_status",
              "lookupValue": "for production"
            }
          ]
        },
        "options": {
          "returnFirstMatch": true
        }
      },
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 4.7,
      "position": [
        208,
        0
      ],
      "id": "c7c27b6e-18e6-4ff1-8aec-cd1f826008e5",
      "name": "Get row(s) in sheet",
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "HrwKbXOa82iROMLP",
          "name": "Google Sheets account"
        }
      }
    },
    {
      "parameters": {
        "promptType": "define",
        "text": "=Article Title:  {{ $json.idea }}\nArticle Description: {{ $json.caption }}",
        "hasOutputParser": true,
        "messages": {
          "messageValues": [
            {
              "message": "=Using the Article Title and Article Description.\n\nWrite a full article, between 800 and 1200 words that matches the Article Title and Description.\n\nThe article should be easy to read, fun and informal. Output the article in markdown format.\n\nKeywords and style:\n{{ $json.channel_style_prompt }}\n\nAt the end of the Article create 3 short video scripts that sum up the main points. Don't use emoticons or emojis in any content"
            }
          ]
        },
        "batching": {}
      },
      "type": "@n8n/n8n-nodes-langchain.chainLlm",
      "typeVersion": 1.7,
      "position": [
        416,
        0
      ],
      "id": "07db92bc-f426-42b5-8bcd-7f2ac7459dd1",
      "name": "Prompts"
    },
    {
      "parameters": {
        "model": {
          "__rl": true,
          "value": "gpt-5.1",
          "mode": "list",
          "cachedResultName": "gpt-5.1"
        },
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "typeVersion": 1.2,
      "position": [
        416,
        208
      ],
      "id": "940de2d3-8adc-43a6-8546-629e8417dab8",
      "name": "OpenAI Chat Model",
      "credentials": {
        "openAiApi": {
          "id": "xf1VUcaTbZRBFRuE",
          "name": "OpenAi account"
        }
      }
    },
    {
      "parameters": {
        "authentication": "oAuth2",
        "path": "=/Comparison Sites/Passebo/Articles and Videos/Article {{ $('Get row(s) in sheet').item.json.id }}/article.txt",
        "fileContent": "={{ $json.text }}"
      },
      "type": "n8n-nodes-base.dropbox",
      "typeVersion": 1,
      "position": [
        752,
        0
      ],
      "id": "7b747980-7966-42cb-8a5f-651b2e201329",
      "name": "Upload a file",
      "credentials": {
        "dropboxOAuth2Api": {
          "id": "m2stFARFQTDuwZL8",
          "name": "Dropbox account"
        }
      }
    },
    {
      "parameters": {
        "operation": "appendOrUpdate",
        "documentId": {
          "__rl": true,
          "value": "1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk",
          "mode": "list",
          "cachedResultName": "Passebo_articles",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk/edit?usp=drivesdk"
        },
        "sheetName": {
          "__rl": true,
          "value": "gid=0",
          "mode": "list",
          "cachedResultName": "Sheet1",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1q6W7pY9b2MSwPDF2jyhINSPwER37sRLVP4FRRooDfy4/edit#gid=0"
        },
        "columns": {
          "mappingMode": "defineBelow",
          "value": {
            "id": "={{ $('Get row(s) in sheet').item.json.id }}",
            "production_status": "done"
          },
          "matchingColumns": [
            "id"
          ],
          "schema": [
            {
              "id": "id",
              "displayName": "id",
              "required": false,
              "defaultMatch": true,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "idea",
              "displayName": "idea",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "caption",
              "displayName": "caption",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "channel_style_prompt",
              "displayName": "channel_style_prompt",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "character_style_prompt",
              "displayName": "character_style_prompt",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "production_status",
              "displayName": "production_status",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "final_output",
              "displayName": "final_output",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "publishing_status",
              "displayName": "publishing_status",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "error_log",
              "displayName": "error_log",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            }
          ],
          "attemptToConvertTypes": false,
          "convertFieldsToString": false
        },
        "options": {}
      },
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 4.7,
      "position": [
        976,
        0
      ],
      "id": "d260207a-add1-402e-92e0-366cd023c0aa",
      "name": "Append or update row in sheet",
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "HrwKbXOa82iROMLP",
          "name": "Google Sheets account"
        }
      }
    }
  ],
  "connections": {
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "Get row(s) in sheet",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get row(s) in sheet": {
      "main": [
        [
          {
            "node": "Prompts",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Prompts": {
      "main": [
        [
          {
            "node": "Upload a file",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "Prompts",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Upload a file": {
      "main": [
        [
          {
            "node": "Append or update row in sheet",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "pinData": {},
  "meta": {
    "templateCredsSetupCompleted": true,
    "instanceId": "8924acd1d8ca289ad0f6611b1f61d82d9464e241cf99969dcbced98155f7113d"
  }
}

RAW_BUFFERClick to expand / collapse

Describe the problem/error/question

The Dropbox "upload a file" widget is failing to upload. It was working until a few weeks ago

What is the error message (if any)?

Problem in node ‘Upload a file‘

Bad request - please check your parameters

Error code 400

Full message 400 - "Error in call to API function "users/get_current_account": Bad HTTP "Content-Type" header: "application/x-www-form-urlencoded". Expecting one of "application/json", "application/json; charset=utf-8", "text/plain; charset=dropbox-cors-hack"."

Please share your workflow/screenshots/recording

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)
⚠️ WARNING ⚠️ If you have sensitive data in your workflow (like API keys), please remove it before sharing.

{
  "nodes": [
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "weeks",
              "triggerAtDay": [
                0,
                4
              ],
              "triggerAtMinute": 10
            }
          ]
        }
      },
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.2,
      "position": [
        0,
        0
      ],
      "id": "88a764c5-5b4f-466c-a0c0-29b558be0955",
      "name": "Schedule Trigger"
    },
    {
      "parameters": {
        "documentId": {
          "__rl": true,
          "value": "1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk",
          "mode": "list",
          "cachedResultName": "Passebo_articles",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk/edit?usp=drivesdk"
        },
        "sheetName": {
          "__rl": true,
          "value": "gid=0",
          "mode": "list",
          "cachedResultName": "Sheet1",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk/edit#gid=0"
        },
        "filtersUI": {
          "values": [
            {
              "lookupColumn": "production_status",
              "lookupValue": "for production"
            }
          ]
        },
        "options": {
          "returnFirstMatch": true
        }
      },
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 4.7,
      "position": [
        208,
        0
      ],
      "id": "c7c27b6e-18e6-4ff1-8aec-cd1f826008e5",
      "name": "Get row(s) in sheet",
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "HrwKbXOa82iROMLP",
          "name": "Google Sheets account"
        }
      }
    },
    {
      "parameters": {
        "promptType": "define",
        "text": "=Article Title:  {{ $json.idea }}\nArticle Description: {{ $json.caption }}",
        "hasOutputParser": true,
        "messages": {
          "messageValues": [
            {
              "message": "=Using the Article Title and Article Description.\n\nWrite a full article, between 800 and 1200 words that matches the Article Title and Description.\n\nThe article should be easy to read, fun and informal. Output the article in markdown format.\n\nKeywords and style:\n{{ $json.channel_style_prompt }}\n\nAt the end of the Article create 3 short video scripts that sum up the main points. Don't use emoticons or emojis in any content"
            }
          ]
        },
        "batching": {}
      },
      "type": "@n8n/n8n-nodes-langchain.chainLlm",
      "typeVersion": 1.7,
      "position": [
        416,
        0
      ],
      "id": "07db92bc-f426-42b5-8bcd-7f2ac7459dd1",
      "name": "Prompts"
    },
    {
      "parameters": {
        "model": {
          "__rl": true,
          "value": "gpt-5.1",
          "mode": "list",
          "cachedResultName": "gpt-5.1"
        },
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "typeVersion": 1.2,
      "position": [
        416,
        208
      ],
      "id": "940de2d3-8adc-43a6-8546-629e8417dab8",
      "name": "OpenAI Chat Model",
      "credentials": {
        "openAiApi": {
          "id": "xf1VUcaTbZRBFRuE",
          "name": "OpenAi account"
        }
      }
    },
    {
      "parameters": {
        "authentication": "oAuth2",
        "path": "=/Comparison Sites/Passebo/Articles and Videos/Article {{ $('Get row(s) in sheet').item.json.id }}/article.txt",
        "fileContent": "={{ $json.text }}"
      },
      "type": "n8n-nodes-base.dropbox",
      "typeVersion": 1,
      "position": [
        752,
        0
      ],
      "id": "7b747980-7966-42cb-8a5f-651b2e201329",
      "name": "Upload a file",
      "credentials": {
        "dropboxOAuth2Api": {
          "id": "m2stFARFQTDuwZL8",
          "name": "Dropbox account"
        }
      }
    },
    {
      "parameters": {
        "operation": "appendOrUpdate",
        "documentId": {
          "__rl": true,
          "value": "1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk",
          "mode": "list",
          "cachedResultName": "Passebo_articles",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1VhUdMQMcTd5mUzOAoy2QPZRl4nafg1NRrCLoN1V9UNk/edit?usp=drivesdk"
        },
        "sheetName": {
          "__rl": true,
          "value": "gid=0",
          "mode": "list",
          "cachedResultName": "Sheet1",
          "cachedResultUrl": "https://docs.google.com/spreadsheets/d/1q6W7pY9b2MSwPDF2jyhINSPwER37sRLVP4FRRooDfy4/edit#gid=0"
        },
        "columns": {
          "mappingMode": "defineBelow",
          "value": {
            "id": "={{ $('Get row(s) in sheet').item.json.id }}",
            "production_status": "done"
          },
          "matchingColumns": [
            "id"
          ],
          "schema": [
            {
              "id": "id",
              "displayName": "id",
              "required": false,
              "defaultMatch": true,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "idea",
              "displayName": "idea",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "caption",
              "displayName": "caption",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "channel_style_prompt",
              "displayName": "channel_style_prompt",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "character_style_prompt",
              "displayName": "character_style_prompt",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "production_status",
              "displayName": "production_status",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "final_output",
              "displayName": "final_output",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "publishing_status",
              "displayName": "publishing_status",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            },
            {
              "id": "error_log",
              "displayName": "error_log",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "canBeUsedToMatch": true,
              "removed": false
            }
          ],
          "attemptToConvertTypes": false,
          "convertFieldsToString": false
        },
        "options": {}
      },
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 4.7,
      "position": [
        976,
        0
      ],
      "id": "d260207a-add1-402e-92e0-366cd023c0aa",
      "name": "Append or update row in sheet",
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "HrwKbXOa82iROMLP",
          "name": "Google Sheets account"
        }
      }
    }
  ],
  "connections": {
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "Get row(s) in sheet",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get row(s) in sheet": {
      "main": [
        [
          {
            "node": "Prompts",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Prompts": {
      "main": [
        [
          {
            "node": "Upload a file",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "Prompts",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Upload a file": {
      "main": [
        [
          {
            "node": "Append or update row in sheet",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "pinData": {},
  "meta": {
    "templateCredsSetupCompleted": true,
    "instanceId": "8924acd1d8ca289ad0f6611b1f61d82d9464e241cf99969dcbced98155f7113d"
  }
}

Share the output returned by the last node

Debug info

core

n8nVersion: 1.123.27
platform: docker (cloud)
nodeJsVersion: 24.13.1
nodeEnv: production
database: sqlite
executionMode: regular
concurrency: 5
license: enterprise (sandbox)

storage

success: all
error: all
progress: false
manual: true
binaryMode: filesystem

pruning

enabled: true
maxAge: 168 hours
maxCount: 2500 executions

client

userAgent: mozilla/5.0 (windows nt 10.0; win64; x64; rv:149.0) gecko/20100101 firefox/149.0
isTouchDevice: false

Generated at: 2026-04-08T15:22:47.740Z}

extent analysis

TL;DR

The Dropbox "upload a file" widget is failing due to an incorrect "Content-Type" header, and setting it to "application/json" may resolve the issue.

Guidance

Check the "Upload a file" node configuration to ensure the "Content-Type" header is set correctly.
Verify that the API endpoint expects "application/json" as the "Content-Type" header.
Update the "Upload a file" node to use the correct "Content-Type" header, which in this case should be "application/json".
Test the workflow again to see if the issue is resolved.

Example

No code example is provided as the issue seems to be related to the configuration of the "Upload a file" node.

Notes

The error message indicates that the "Content-Type" header is set to "application/x-www-form-urlencoded", which is not accepted by the API. The API expects "application/json", "application/json; charset=utf-8", or "text/plain; charset=dropbox-cors-hack". Updating the "Content-Type" header to one of these accepted values may resolve the issue.

Recommendation

Apply workaround: Update the "Content-Type" header in the "Upload a file" node to "application/json" to match the expected header by the API.

Vote matrix · Quick signals

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Verified / Reproducible

Can you reproduce it reliably?

#api #model loading #dependency error #configuration error #environment variable

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Engineering

n8n - 💡(How to fix) Fix Dropbox Upload a file widget has stopped working [1 comments, 2 participants]

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Error Message

Describe the problem/error/question

What is the error message (if any)?

Code Example

Describe the problem/error/question

What is the error message (if any)?

Please share your workflow/screenshots/recording

Share the output returned by the last node

Debug info

core

storage

pruning

client

extent analysis

TL;DR

Guidance

Example

Notes

Recommendation

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n8n - 💡(How to fix) Fix Dropbox Upload a file widget has stopped working [1 comments, 2 participants]

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