Can_send_to_GoogleAppEngine_JSON_Python_Service fails #7

Problem running testcase for Reusability:

ServiceStack.WebServiceException : Internal Server Error
at ServiceStack.ServiceClientBase.ThrowWebServiceException(Exception ex, String requestUri)
at ServiceStack.ServiceClientBase.ThrowResponseTypeException(Object request, Exception ex, String requestUri)
at ServiceStack.ServiceClientBase.HandleResponseException(Exception ex, Object request, String requestUri, Func1 createWebRequest, Func2 getResponse, ref TResponse response)
at ServiceStack.ServiceClientBase.Send(String httpMethod, String relativeOrAbsoluteUrl, Object request)
at ServiceStack.ServiceClientBase.Post(String relativeOrAbsoluteUrl, Object requestDto)
at ServiceStack.ServiceClientBase.Post(IReturn`1 requestDto)
at Reusability.Tests.Can_send_to_GoogleAppEngine_JSON_Python_Service() in Tests.cs: line 14