I'm stuck with no way back out of it

I’m stuck in the museum with the blue orb. The interaction with the guard by the blue orb messed things up and now I’m permanently stuck there.

This guy had the problem in December of last year.

Is there any fix?
I do have a backup save, but that’s from about 7 hours gameplay ago.

If you can open your dexnav, try using it’s memory chamber to black out. Otherwise, you might have to deal with re-doing the lost gameplay by loading a backup.