unsupported_media_type

The request body is not JSON.

Common causes

• The Content-Type header is missing or is not application/json.

How to fix

Send Content-Type: application/json.

Response

{
  "type": "https://castra.mehmetozer.dev/problems/unsupported_media_type",
  "title": "…",
  "status": 415,
  "detail": "…"
}

detail says what exactly went wrong for this request.