En la compatibilidad con ASP.NET no se admiten otros protocolos que no sean HTTP/HTTPS. Quite el extremo 'X' o deshabilite la compatibilidad con ASP.NET para la aplicación.
Click to search this error in Google
English version
Protocols other than HTTP/HTTPS are not supported under ASP.NET compatibility. Remove the endpoint 'X' or disable ASP.NET compatibility for the application.