I've got this exception while trying to access the Options :
I'm sorry, but an uncaught exception occurred.
While running game code:
File "renpy/common/000statements.rpy", line 569, in execute_call_screen
store._return = renpy.call_screen(name, *args, **kwargs)
File "renpy/common/00preferences.rpy", line 553, in Preference
rv = get()
File "renpy/common/00preferences.rpy", line 551, in get
raise Exception("Preference(%r, %r) is unknown." % (name , value))
Exception: Preference(u'text speed', 124.76623376623377) is unknown.
Anyone knows something about it ?