My team created a simple web service in .NET so that our appian process can cons

My team created a simple web service in .NET so that our appian process can consume. We created a very plain vanilla .NET solution using WCF ServiceContract. In our app.config we are specifying wshttpbinding. When we assign the WSDL into the Call Web Service node we get the following error. "An error occurred while processing the WSDL. The WSDL may contain invalid or unsupported elements. (APNX-1-4040-000)". This seems to be a generic error message. I looked into the log but I was not able to find anything useful.
Additionally, when we just basicHttpBinding, the WSDL is valid in the Call Web Service. We would like to use wsHttpBinding. Can someone please provide some guidance?

server.log

OriginalPostID-142933

OriginalPostID-142933