I am sorry you are getting that issue. Its a pain in the buttocks. There is a thread about this issue and various methods that work for various causes. I ran into last summer ish. I was going to say fall but I think it was actually a little earlier than that. I know ‘check and make sure are no mods’ on the mods tab was one. Validating files (that didnt resolve mine either), rebooting also doesnt work. I think I had to go remove a back up file or something. It did not cause me to lose anything and whichever file it was worked back then.