Sorry, I should have explained it better, this shows up when I try to load a save file.
[code]
I'm sorry, but an uncaught exception occurred.
While running game code:
File "renpy/common/00action_file.rpy", line 427, in __call__
renpy.load(fn)
Exception: Couldn't find a place to stop rolling back. Perhaps the script changed in an incompatible way?