Cubase won't play, wouldn't shut down, then wouldn't restart and licenser can't find USB

I just came back from a break and left my Cubase session open.

There was no sound when I came back, so I tried to shut down to restart, but Cubase wouldn’t close and kept spinning the rainbow wheel.

I had to force quit, but it wouldn’t restart so I tried to update the eLicenser (as I usually do several times a month) but the eLicenser couldn’t find my UBS key.