I've been having an unique issue with the Serious TTT servers for the past week. Whenever I attempt to join the server, the loading bar gets stuck on 'Authenticating with Steam' and will not progress. I do not have this issue with any other Gmod server, and it is consistent with every SeriousGmod TTT server (I have not tried other gamemodes). I've attached a picture of the issue below, but I'm not sure it'll be any help. Does anyone have any idea what's going on?...
"Authenticating with Steam"
"Authenticating with Steam"