Corrupt File!

I'm not sure if it's just my computer, but one of my files got corrupted a few days ago, and this is what it says:
"Measure 525, staff 3 incomplete. Expected: 3/8; Found: 15/24"
Dunno what that means. I don't remember changing time signatures much, but I don't know how to fix it. Any help is very much appreciated. Thanks.