The Invalid HTTP Method error is issued in the following situation:
- Input parameters with Send In property set to 'Body' are not allowed for GET methods. Either change the (<method name>) method, or remove the input parameter: you are trying to change the place where the input parameter is sent, from URL to Body, and this is incompatible with the HTTP Method of the REST API Method, which is set to GET.
Clicking the symbol will take you directly to the REST API method's property where the problem was detected. Follow the instructions in the error message to resolve it.
About Error Messages