The request filtering section of the applicationhost.config file or a web.config file contains an entry to deny the HTTP ...

The request filtering section of the applicationhost.config file or a web.config file contains an entry to deny the HTTP verb used for the request. This is a security feature and should not be changed unless the scope of the change is fully understood. If the HTTP Verb should be allowed then remove the HTTP verb being denied from configuration/system.webServer/security/requestFiltering/verbs.