The operation cannot complete because of an unknown error [CANT]
I am currently working on a new map for my school and on Friday when I tried to render extrude and bevel, it gave me an error message saying "The operation cannot complete because of an unknown error [CANT]" everytime I try to use the pen tool it gives that same error message and also gives an error message saying" An error occurred while processing the appearance of an object" and it is VERY ANNOYING. can someone please explain this? I have a deadline to meet.
I would also like to note that I work on school computers so I have limited access to settings.
