..however it does not work for ( just for him). If i host, the message comes again if someone join

I have find a thing. We were trieing to create "blind" maps, over the random map generator. Than the error poped up. Now we have take a map we both have and it worked... -.- After this, We have generate a unexplored map... it worked again... i think blind maps some kind of trouble

I just have the windows defender, and i nearly shut down everything that could effect the game. No change.

Each time I want to host a game, the game ist joinable, but then a pop up appears with the message, host has left the game. My brother and I have delete the ports in the firewall (supreme commander and faf ports). After restarting a game, firewall automatically asks us the ports to agree... so after another try, still the same massage pops up. Now we have try to join in a game of another host. It works.. but we both cant create a game.... oh may important. We are using the same internet.. but this shouldnt be the reason of issue cause we could play together before