You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
The glitch basically disables you from continuing the story mode. It just happens unexpectedly. For me it happened after I tried out multiplayer so whether it does or doesn't have something to do with it I cant tell for sure.