Can’t play any games on ultimate team

When I try to play a game on ultimate team I get the message “connecting to ultimate team is not possible at the moment you will now be returned to the main menu” I can get on ultimate team just  fine and do sbc’s, buy players, open pack’s etc but as soon as I try to play a game I get that message. I tried to delete my squad and go back in and when I did that and used the squad builder to fill my team it worked, but as soon as I tried to put my own players in that I actually wanted to use I got that message again? Anyone know how to fix this I’m trying to play with a specific squad of players I don’t want to use the team generated to me.