Co-op problem [SOLVED]

[Kali]

I've tried launching the FA campaign so that I can play with my friend and this error box popped up:

Spoiler: show

If I press continue, yet another error box pops up, I'll put it in the attachments.

I used to be able to play with some of my friends, but not all, I kept getting the out of sync error with one of my friend and the map wouldn't properly start, but perhaps that's for another time

[Sheeo]

This happens sometimes with the current patcher. Use Options -> Clear game data to fix it temporarily.

[Kali]

Wow thank You, it does work now, I feel dumb because of how simple the fix was