Winter Wonder Trade-In Bug: player erroneously labeled as in lineup

I just traded in a couple dozen Winter Wonders cards in order to buy the Van Der Sar (750 shards). I have exactly 740 shards and just need to trade in one more player (Olsen) to obtain my last 10 shards, but the game is glitching and says he’s in my lineup and won’t let me execute the trade. I have screenshots showing the situation (including the fact that he’s in my reserves). I’ve tried closing the app and re-opening it, but that hasn’t solved the problem. Can someone please me resolve this before the Winter Wonders event ends and I miss out on the trade in I went to all this trouble to earn?

Thanks!