Several Windows Server reported this
Solution was connecting to SUSDB using Servername: np:\.\pipe\MICROSOFT##WID\tsql\query
Start SQL Server Management Studio elevated or get a Login failed for user
Then query for the current value of MaxXMLPerRequest in table tbConfigurationC
USE SUSDB GO SELECT MaxXMLPerRequest from tbConfigurationC
Then update the value:
UPDATE tbConfigurationC SET MaxXMLPerRequest = 0
And check for updates again.