Whenever I invite my friend to a custom zombies lobby, his game tries to load semper fi (or vice versa). After a while the game crashes. I would love some help with this, as I cant find a solution online :/. Before you ask, yes, we have both loaded the same mod, yes I change the lobby map to Nazi zombies, and yes, we have both installed everything correctly. I would greatly appreciate a fix for this, thanks! :)

Whenever I invite my friend to a custom zombies lobby, his game tries to load semper fi (or vice versa). After a while the game crashes. I would love some help with this, as I cant find a solution online . Before you ask, yes, we have both loaded the same mod, yes I change the lobby map to Nazi zombies, and yes, we have both installed everything correctly. I would greatly appreciate a fix for this, thanks!

does the game only crash when you go in the game with your friend?