Same thing is happening to me. REally bad the last 4 days. I have tried what they say as playing during times when less people are on but this has not helped. I am trying to get the yo-kai weapons achievement and every time I enter a fate, or after a minute or so of play time or during a fate I get kicked completely from game with always the same 90002 error. Enix needs to fix this. Were playing on a subscription, we should get to play or get our money back for the (days, Weeks) we can't play because of this.