I've been playing Titan Quest multiplayer with GOG Twitch community regularly every Sunday but today 2016-09-25 it seems to refuse to connect to the servers. Either "Host" or "Join" Internet game options, when I click on "Connect" it just sits there not doing anything. Note that I did update my game to the latest version a few days ago when Galaxy pushed that out.

I asked someone else to try to connect and they also couldn't so it looks like a general issue. Please fix!

Now I'm likely going to have to wait another week to play again :(

Seems to be. I'm on 1.31 and I'm not sure if that's the current version. But I get the same issue as you.

1.31 is latest. I'm on 1.30 and have the same problem. I've been meaning to investigate Tunngle anyway to see if it fixes LAN play.

Multiplayer is back up now. I don't know if it was the latest update to 1.31 TXT (?!) or a server side issue that was fixed but it's working. Looking forward to my game on Sunday, yay!