Steinberg Library Manager Hangs opening

Hello, just installed Cubase Elements 10.5.2 on Win10 2004 and the Library Manager does not open for users, it hangs with a rapidly flashing cursor. I can also replicate this trying to open a VSTsound file from one of the Library folders in C:\ProgramData\Steinberg.

There is no firewall or filtering or file restrictions in place, but the users are just ‘Users’ rather than ‘Administrators’. We are a school, the accounts will definitely need to remain as just Users.

The Library Manager opens when logged in as a domain administrator.

What does the Library Manager or its files actually try and do when opening?