Solved Multiplayer/Co-op Down

[CaptainNoFun]

It seems the option for multiplayer is down. I'm on a Windows computer running windows 10, Stardew version 1.5.4, made sure Steam and the game were up to date
When launching Stardew, can start a single player game, but unable to join a co-op. The option for Invite Code is not there. Tried using LAN and also does not connect.
Troubleshooting attempted:
-Ensuring all is up to date, including computer
-Force close Stardew and Steam
-Restart computer
-attempted lan connection
-ensured internet is connected

 

[ShinyPorygon]

GOG server went down. Steam uses them for stardew as well. You will have to wait for GOG to fix it. No ETA.

 

[Happy.lil.sushi.roll]

it seems to be workin now :)

 

[Odin]

It appears that GOG's servers are back up, this issue should be resolved now.