There is no crash error.
The game basically "locks", or better, it
does nothing more than looking at a wall.

The "menu" responds though. So it seems as
if it is waiting for something.

When running a local client too, the client shows just a black
screen. The playercount always keeps at 0 on host and client.

Also does not connect to your server.

I dont have my big compter right now. So my old Laptop
might not be representative.