All error codes

unsupported_media_type

HTTP 415 Request body must be application/json

What happened

The request has a body, but its Content-Type is not application/json - most often a form-encoded body produced by an HTTP client's default form helper.

What to do

Set Content-Type: application/json and send the body as a JSON object. Requests that carry no body at all are unaffected.

Retrying

Fix the request and send it again.

How it arrives

{
    "type": "https://docs.fiberax.com/errors/unsupported_media_type",
    "title": "Request body must be application/json",
    "status": 415,
    "code": "unsupported_media_type",
    "request_id": "a277dcd1ca652c65"
}

Branch your code on code, never on the wording of title.