connection failed co-op

Hello. From what I understand, I have been having issues having steam connect to Stardew valley when attempting to join a co-op game. As I log into the game, and click on co-op, I receive a "connecting to online services..." then not showing the option to connect via game code or through steam...

Hello, me and my boyfriend has been trying to do co-op for about an hour now and it kept saying connection failed. We tried everything like restarting the steam,pc,router. I'm using Windows 10 while he's using Windows 11. We even tried using the turning off firewall, and deactivating anti-virus...