System.NullReferenceException: Object reference not set to an instance of an object. Server 2012

I removed and re-nstalled the remote desktop services roles which cleared up one error, but another has shown itself:

System.NullReferenceException: Object reference not set to an instance of an object.

This error points to the line

Line 163:            tswf = new WebFeed(RdpType.Both);Error -->  Line 164:            strAppFeed = tswf.GenerateFeed(Line 165:                            strUserSID, 

I have not been able to find anything on this error. Does anyone have information on this or know of a thread where this has been corrected?

Thanks