How To Fix a 415 Unsupported Media Type?
Fixing a 415 error can be time-consuming for the client as it indicates the issue is in what the client is sending that the web server can't process. In other words, if you come across a 415 error, it means that you have to fix the error yourself.
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Here are the three most common ways for fixing a 415 Unsupported Media Type:
Make sure that you are sending the right Content-Type header value.
Confirm that the server can process the value defined in the Content-Type header.
Check the Accept header to see what the server can process.