Low Level Fatal Error

Trying to edit some text in a storymode file to be used as a mod and I saw this error pop up.

LowLevelFatalError [File:Unknown] [Line 3171]
REDAdTextData/Game/Adv/Text/storytext_Movie.storytext_Movie: Serial
size mismatch: Got 68, Expected 9672

Before it would just be stuck in an infinite loading screen and now its this, so I’m making progress, but stumped on what to do here.