Unable to join fireteam/start dedicated server.

I’ve restarted my xbox. I’ve rebooted my network. Yet I’m either getting “unable to join fireteam” or “unable to start dedicated server”. Arena playlists and warzone playlists.

Having same problem. Infuriating. It’s reasons like this that I can’t get any of my friends back in to this game.

Free-for-all works. But action sack, swat, and warzone firefight do not.