HTTP 422 · type invalid_request_error · retryable false

defaultMessage Media MIME type does not match the declared type.

invalid_media_type

The media MIME / extension does not match what the message or template header allows.

What to do

1. Align Content-Type and file extension with the component type (image, video, document, audio).
2. For template headers, use the type Meta approved for that template.
3. Re-encode to a supported format (e.g. JPEG/PNG for images, PDF for documents when required).
4. Re-check the URL after re-upload — stale caches can serve the wrong type.