I get this in the log, even though I do not use WSUS...:
<![LOG[An error occurred while parsing XML node of the catalog: Could not find file 'C:\Program Files\Update Services\Schema\baseapplicabilityrules.xsd'. [System.IO.FileNotFoundException]]LOG]!><time="08:14:42.357319" date="08-30-2022" component="Logger" context="" type="3" thread="14" file="">
Tried latest preview (2.1.6.2) to see if it was fixed in that version, but it isn't.
<![LOG[An error occurred while parsing XML node of the catalog: Could not find file 'C:\Program Files\Update Services\Schema\baseapplicabilityrules.xsd'. [System.IO.FileNotFoundException]]LOG]!><time="08:14:42.357319" date="08-30-2022" component="Logger" context="" type="3" thread="14" file="">
Tried latest preview (2.1.6.2) to see if it was fixed in that version, but it isn't.