When i was sent a invite to my friends Co-op. I had realised i had a older one as well. I accepted Both then when i went to join ,it would not let me. So i reset my game and then i got this message. "A error has occured joining skyblock." I have had this for 2 days and nothing will work i re-installed and everything. What i think happened was i accepted both the invites too fast. Also i have the rank and had 2 open slots so it wasn't that. I really want to play and hope someone will help.