I keep getting this on a model I'm trying to open. It was having trouble saving before (It was one of those 'just to be sure' saves, I didn't make any progress form the last save) and now it appears whenever I try and open it, its the only one that seems to have this problem.

Also when I try and open other models, I just get a line across the screen and cant move it, even with the view button

Help?

Update: I All the other models are no longer broken, but I'm still getting the E1027 notice for the model. its also saying: "TypeError: cannot read properties of undefined (reading 'library')"