System.InvalidOperationException: The type Microsoft.MetadirectoryServices.FunctionLibrary.NoFlowSingleton was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically

Hi,

Whenever I am trying to create new user its giving me below postprocessing error on portal log.But user is getting created synced to active directory. Suddenly some access issue happened which we recovered but this issue started, Can somebody help.

System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: The type Microsoft.MetadirectoryServices.FunctionLibrary.NoFlowSingleton was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically.
   at System.Xml.Serialization.XmlSerializationWriter.WriteTypedPrimitive(String name, String ns, Object o, Boolean xsiType)
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterRequestParameter.Write1_Object(String n, String ns, Object o, Boolean isNullable, Boolean needType)
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterRequestParameter.Write9_UpdateRequestParameter(String n, String ns, UpdateRequestParameter o, Boolean isNullable, Boolean needType)
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterRequestParameter.Write11_RequestParameter(Object o)
   --- End of inner exception stack trace ---
   at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
   at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o)
   at Microsoft.ResourceManagement.WebServices.WSResourceManagement.RequestType.AddParameter(RequestParameter parameter)
   at Microsoft.ResourceManagement.WebServices.WSResourceManagement.RequestType.SetRequestParameters(OperationType operation, UniqueIdentifier targetObject, List`1 requestParameters)
   at Microsoft.ResourceManagement.WebServices.RequestDispatcher.CreateRequest(CreateRequestDispatchParameter dispatchParameter)
   at Microsoft.ResourceManagement.WebServices.RequestDispatcher.CreateRequest(UniqueIdentifier requestor, UniqueIdentifier targetIdentifier, OperationType operation, String businessJustification, List`1 requestParameters, CultureInfo locale, Boolean isChildRequest, Guid cause, Boolean doEvaluation, Nullable`1 serviceId, Nullable`1 servicePartitionId, Boolean maintenanceMode, String synchronizationSequenceIdentifier)
   at Microsoft.ResourceManagement.WebServices.RequestDispatcher.CreateRequest(UniqueIdentifier requestor, UniqueIdentifier targetIdentifier, OperationType operation, String businessJustification, List`1 requestParameters, CultureInfo locale, Boolean isChildRequest, Guid cause)
   at Microsoft.ResourceManagement.Workflow.Hosting.RequestWorkItemProcessor.CreateRequest(UniqueIdentifier requestor, UniqueIdentifier objectId, OperationType operation, List`1 requestParameters, Guid parentRequest)
   at Microsoft.ResourceManagement.Workflow.Hosting.RequestWorkItemProcessor.ProcessPutWorkItem(UpdateRequestWorkItem updateWorkItem)
   at Microsoft.ResourceManagement.Workflow.Hosting.RequestWorkItemProcessor.ProcessWorkItem(WorkItem workItem)</RequestStatusDetail>

Thanks,

Venkatesh Mahajan