Puuuh, i honestly cant can tell. Ive just tried to join and it worked for me. Must be something in your home network, computer setup or routing error at your internet provider. You could try to join the server on cellular network on your mobile (if you got the ts3 mobile client) to rule your network/computer out.
Why can't i join Cosmic pvp every time i try to join it says Network is unreachable Can you please help me join