Poketheatre Black 2 Help

Hey all,I'm playing Black 2, I've just completed filming for the poketheatre, and now the game won't let me progress. If I attempt to save the file, the game crashes, saying, "The Save Data Could Not be Accessed" on a blue screen. If I decline to release, the guy at the door stops me passing.Any help would be massively appreciated. :)

What emulator or Flashcard?

Looks like you've got a corrupted save file.
Do you have backups of any old ones?

Does he want my save file?