How many games have you gotten? is it walk-on or team?
I have been trying on PS4. Sometimes I even leave it open and go do something else - it never has more than 6 players and never loads a game.
Recently, it kicks me out before I can even get to that practice court thing... the past 5 times I've tried today, it kicks me out right away (I have 100/100 internet btw)
Nobody on my friends list can get it working either.