Error 2006: Invalid content - Relay Messenger

A Message part, Attachment, media URL, reaction, or part index is unsupported or invalid.

Response

{
  "error": {
    "status": 422,
    "code": 2006,
    "message": "A Message part, Attachment, media URL, reaction, or part index is unsupported or invalid.",
    "doc_url": "https://docs.relayapp.im/error/codes/2xxx/2006"
  },
  "success": false,
  "trace_id": "b923d71e50be43ba9e0fe1e34a7676c2"
}

Fix

Read error.message for the rejected content boundary.
Correct the content type, size, URL, or part index before retrying.

The HTTP status can be 413, 415, or 422 for this code. Read error.status from the response.

Retry

Do not retry the same request unchanged.