As it might be caused by Microsoft and it’s automatic updates, it would be helpful if you could provide a list of the updates installed yesterday. I don’t think that the devs are of much help for you as the error looks like a typical .NET error (.NET is a prerequisite for Roon to run correctly, but not provided by Roon) – you may just get the tip to check or reinstall .NET.
Note: Check that .NET 3.5 is installed, this was the last known Microsoft update issue.
AFAIK there is no need to check WCF also.