415 Status Code Explained
A 415 status code is returned by a server to indicate that part of the request was in an unsupported format, i.e., The request was unsuccessful because the entity of the request is in a format not supported by the requested resource for the method requested.
Why it occurs
The request did not specify any media types that the server or resource supports. For example the client specified that an image resource should be served as image/svg+xml, but the server cannot find a matching version of the image.
Fixing 415 Error Code
The problem can only be resolved by examining what the client is trying to do and then discussing with your ISP why the Web server rejects the media type specified by the client system. If you are monitor your website through 100pulse, we will intimate whenever you encounter 415 status code error through e-mail or Short message service.