Client Game Crash

[Nomad96]

Need Help:/ I hosted a Game in a local network with two PCs. One host one client.

On host pc the game works fine but every time the client trys to connect, the clients game crashes after the map-loadingscreen.

I tried both PCs as host or client, but only client crashes.

I use custom game and not a dedicated server by the way.

Error pops up:

Sorry for that Quality.