coop problem

Hello there, im currently playing through xbox game pass, and im signed in. The problem is, when i want to play co-op the game is saying that im not signed in. Please help me . thx <3

So I first opened stardew like a long time ago, and the game keep immediately close after I run it. I searched for the solution and have found that I could delete this file named "galaxy64.dll", the post did mention that if I delete it, my co-op won't be working. Anyway, I tried it, and it does...

Greetings to Stardew fans. Today I bought the game at a discount, and decided to play it with a friend. But when you go to my server, a friend has a long connection and then a connection error. What to do in such a problem? And is there a fix of that?