I get an error message: Communication error or Error 
To solve the issue, please follow the instruction below.
- Make sure your window is updated and then restart.
- Make sure your profile is admin of the PC and run the game as administrator.
- Open up your router firewall settings and allow P2P applications and pings to the Gateway.
- Turn off Anti-Virus settings or add an exception for the Black Squad game folder (C:\Program Files (x86)\Steam\steamapps\common\Black Squad)
- Turn off Firewall or add an exception for Black Squad
After follow all the instruction, please check whether the issue is solved or not.