So the error where the game says “could not find a server suitable for all members of your fireteam” popped up yesterday. I went to the guide tapped the sign out button and hastily went back to the game before I was actually signed out. The game said “fireteam changed” or something similar. I signed back in without closing the “fireteam changed message” and entered arena, where the error had disappeared.
I had a similar issue with this earlier tonight. Thought it might have had something to do with party locations since the fireteam was split between NY, FL and Australia.
I was playing solo then so I’m not sure how to fix ur issue