If I'm just being stupid let me know but I've never seen this happen before but idk.
We were trying to play on Gytyyhgfffff's Battlemix but he messaged me and said this:
Wormy9111: its saying that i can't join because i havn't authenticated with the master server
Anybody know how to fix this? His steam name is the same as his blockland name and he has blockland on steam.