Hello guys

Since the community has been less active, not a lot of people have had this problem.
For people like me and my friend it's the first time trying co-op zombies but we fail every time.

It goes af follows : we join lobby, we start the game. On the loading screen for one off us it says 1 ready (host)  1loading an for the other it says both loading. The host then sees the ingame map for about 0,5 second then it returns to the menu while the other player is stuck on the loading screen and has to manually shut down the game.

It applies to custom maps aswell as the standard waw maps. we verified the game cache and allowed firewall connection.
I was considering it might be because I run windowns 10.

OMG this error occures all the time, I'm glad to see i'm not the only one with this problem.