Problem when playing on LAN (Command Conquer: Generals)

Good day. I apologize if there was a similar topic somewhere, I personally did not find it. The problem is that when we launch the generals (we tried almost all versions, even modifications, such as counters, etc.) on the local network, 4-5 people, after loading the map, a dialog box pops up saying that all the players have disconnected, what does this window gets out at all, without an exception. Although the others loaded normally, the only option is to kick everyone, or exit yourself, and after that, the game continues for everyone, but only alone. Google really could not give out normal information, maybe someone faced the same problem and knows how to solve it.