Getting errors like this:
mssql$microsoft##ssee[error] 33002 NT AUTHORITY\NETWORK SERVICE Access to module dbo.spConfiguration is blocked because the signature is not valid.
Is the wsus.msc console not connecting either?
Here is what I did to fix this:
Rename the wsus.msc to wsus.msc.old and re-install the snap in - start->Run->mmc