Cant signt in

Sorry to ask this in general but I cant find any help anywhere.I downloaded Killer instinct and it doesnt log in.A white screen pops up and quickly dissapears and thats it.Please help

Unfortunately, it’s highly unlikely you’re going to find a solution here. And based on what I’ve seen from other folks on this forum, if you decide to contact Microsoft, they’ll just redirect you right back to here. For such a buggy game, it’s unfortunate the customer service is so poor.