Rhino Doesn't properly work due to Plug in Error

[auris_degutis]

Used the 90 day evaluation trial and this message pops up, doesn’t allow for connecting to the internet and can’t install any plugins that aren’t in the PackageManager database

[John_Brock]

If it were me, I’d find Rhino 8 on the application list in Control Panel, select it, click Change, and try a Repair.
Don’t be surprised if you need to reboot.

Any luck?