Trouble joining friends lobbies

[Pikuku20]

I'm having trouble connecting to one of my friends lobbies, I try to enter through the friends tab and I get the message "Unable to join game session", I also tried to join via IP which it basically does nothing, it says "joining game session" and the treyarch logo loading but after 3 seconds the message just disappears. I`ve tried with other friends and joined in the first try. I also restarted my game 2 times and still nothing

[CaptnStuhlgang]

This post is deleted!

[Resxt]

https://plutonium.pw/docs/custom-games/