I'm sorry, but an uncaught exception occurred.

While running game code:
File "renpy/common/00gamemenu.rpy", line 173, in script
$ ui.interact()
File "renpy/common/00gamemenu.rpy", line 173, in <module>
$ ui.interact()
File "renpy/common/00action_file.rpy", line 357, in __call__
renpy.save(fn, extra_info=save_name)
PicklingError: Can't pickle <type 'module'>: attribute lookup __builtin__.module failed