Overview

Your payload format isn't supported.

Takeaways

  1. The origin server is refusing to service the request because the payload is in a format not supported by this method on the target resource.
  2. The format problem might be due to the request's indicated Content-Type or Content-Encoding, or as a result of inspecting the data directly.

Further Reading

Specification

415 Unsupported Media Type | The HTTP Working Group

415 Unsupported Media Type

MDN web docs

Content-Type header field

MDN web docs

Content-Encoding header field

MDN web docs

Accept header field

MDN web docs