Adding PC Error: DataPortal.Fetch failed

Hi all, I'm trying to setup Solarwinds Patch Manager but am running into some issues.  I've installed Patch Manager but when I open it up and select to add a computer I get this message after entering the login credentials:

Add PC Error.PNG

I tried to edit the registry to allow 'USERS' read access, but my server doesn't have a 'USERS' group in the permissions section.  Do I need to add this on the WSUS/Patch Manager server, or shouldn't this group already be available?