06-17-2013 08:11 AM
The only solution that comes to mind would be to delete the game data from the folder and reinstall it. However, I do not believe that through PlayStation Plus a game data file is installed. Unfortunately, I would think that you would need to redownload the game completely.
If you call up Sony's tech support I'm sure they would have you do the same thing. However, they also have other diagnostics to run along with that. Whether any of this will fix the game or not is hard to say.