I'm almost 90 percent certain that I have every aspect of this server set up correctly. However, I can't invite my friends through the steam overlay. The option is just not there, and even if I try to invite them using the game UI, it just tells them I am not in a joinable game when they accept the invite. The strange thing is, they can connect just fine using the console. The server is also viewable and joinable by other people in the public, because I've had random connect in the middle of the game before. Is there just some value in the files somewhere that I'm missing?