Can't finish Keep a Light On quest.

I'm on PC.

I get there. Neve and Rook are talking to Rana. Neve relights the orb and walks off. The scene ends. Cue black loading screen and then the usual error people get when they try to load most of their saves. It sends me back to the title screen. I've tried multiple times to complete this quest and verified all my files in case something got broken. It doesn't want to cooperate, and I cannot advance Neve's quest line without it.