I just installed fiddler, and not sure if I set it up correctly. I see the error 504, showing in the capture window of fiddler. When I click on Raw, I see the following error message, but not sure how to proceed.
HTTP/1.1 504 Fiddler - Receive Failure
Content-Type: text/html; charset=UTF-8
ReadResponse() failed: The server did not return a response for this request.