How can I resolve a 403 error when posting an image on LinkedIn using the n8n workflow template?

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I am using the Download and post an image on LinkedIn workflow template in n8n, but I receive a 403 error when attempting to post an image on LinkedIn.

My setup:

Mapped LinkedIn credentials via OAuth
n8n version: latest
Database: default (SQLite)
Running environment: (Docker, npm, n8n cloud, desktop app – not specified)
Operating system: (not specified)

Error details:

TEXT
{  
  “errorMessage”: “Forbidden - perhaps check your credentials?”,  
  “errorDescription”: “403 - {\"status\":403}”,  
  “errorDetails”: {  
    “rawErrorMessage”: [  
      “403 - {\"status\":403}”  
    ],  
    “httpCode”: “403”  
  },  
  “n8nDetails”: {  
    “nodeName”: “LinkedIn”,  
    “nodeType”: “n8n-nodes-base.linkedIn”,  
    “nodeVersion”: 1,  
    “resource”: “post”,  
    “operation”: “create”,  
    “time”: “2/17/2025, 6:05:53 PM”,  
    “n8nVersion”: “1.78.1 (Cloud)”,  
    “binaryDataMode”: “filesystem”,  
    “stackTrace”: [  
      “NodeApiError: Forbidden - perhaps check your credentials?”,  
      " at ExecuteContext.linkedInApiRequest (/usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/LinkedIn/GenericFunctions.js:50:15)",  
      " at processTicksAndRejections (node:internal/process/task_queues:95:5)",  
      " at ExecuteContext.execute (/usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/LinkedIn/LinkedIn.node.js:150:52)",  
      " at WorkflowExecute.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/execution-engine/workflow-execute.js:633:19)",  
      " at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/execution-engine/workflow-execute.js:882:51",  
      " at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/execution-engine/workflow-execute.js:1216:20"  
    ]  
  }  
}

The workflow image is shown below:

n8n.io

Additional context:

This issue might be linked to OAuth credentials or permissions for posting on LinkedIn. I would appreciate suggestions on resolving the error, such as verifying credentials/scopes or configuration issues.

Any help is appreciated!

Comments 0

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Answers 1

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1 Answer

Answer by StackOverflow TychoAI Agent • 20 days ago

Below is some guidance based on the LinkedIn node documentation for n8n:

Error Overview

The error message indicates a 403 HTTP status with the following details:

"errorMessage": "Forbidden - perhaps check your credentials?",
"errorDescription": "403 - {\"status\":403}",

A 403 error means you are not allowed to execute the requested operation. This is typically due to permission issues with your LinkedIn credentials or missing access rights.

Possible Causes & Recommendations

Credential Scopes/Permissions
Make sure your LinkedIn app has been granted the correct scopes.
- For posting operations, your credentials must include the proper scopes (e.g. w_organization_social if posting as an organization).
- If you're using OAuth credentials, confirm that your app’s permissions match the operations you are trying to perform.
Posting as Organization
If you are trying to post as an organization, the documentation specifies that:
- You need to input the organization number (not the full URN) in the related field.
- More importantly, for posting as an organization, your LinkedIn app must pass through LinkedIn's Community Management App Review process.
  Without this approval, the API will return a forbidden (403) error.
Review Your OAuth Mapping
Since you mentioned that your credentials are mapped via OAuth, ensure that:
- Your app configuration in the LinkedIn Developer portal is complete.
- You have copied both the Client ID and Client Secret correctly.
- The authentication method used (Community Management OAuth2 or OAuth2) is appropriate for your use case and that you have selected the required OAuth type in n8n.

Steps to Troubleshoot

Check Permissions: Confirm your LinkedIn app has been granted the required scopes in its settings (and that these scopes match the operation, e.g. posting an image).
Community Management App Review:
If you are posting as an organization, submit your app for review to ensure that it can post type content on behalf of the organization.
Review Workflow Parameters:
Double-check that you have correctly configured the node parameters (such as Post As, Person Name or ID / Organization URN, and Media Category).

Following these steps should help resolve the 403 error. If the issue remains, it might help to verify your app’s configuration in the LinkedIn Developer portal or reach out to LinkedIn support for more details on your app’s permissions.

Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?

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