I got it to work but not sure if I would recommend trying what I did but I'll tell you anyway and some steps might not be required but I'll include. Initially when I had access to the game i played a gauntlet match and then i quit the game mid game through the dashboard. This lost me access to ultimate team via a bug. I uninstalled the game and deleted saved data, then after a while got access through the web app while I downloaded the game again. I deleted all my squads and left the active one blank. Went back to it a few hours later and it let me in on the game. Because of the first step it counted my disconnection as a loss, which was the 3rd game of the gauntlet entry. I was able to start a new entry and the bug went away. I hope you get it sorted.