Your opponent has left the match

I have been match making for nearly a hour on Rivals and Champion, whenever I matched up with a player, they left. If I got lucky I matched up with all bronze XI teams and the game quits on itself saying not matching date detected or something like that.

This is so frustrating for me, Rush and friendlies are fine, but for some reason Rivals and Champion got this problem and I can not finish my objective (6 weekly play) for some cards.