Https://us.forums.blizzard.com/en/d3/t/start-game-greyed-out-unable-to-join-game-only-available-to-party-leader/4211/46

this is horrible. over 40 people I have found so far kant play for 10+ days now and Missed out on PTR POST HERE Start Game Greyed Out - Unable to join game, only available to party leader - #46 by CosmicPower-11120