Impossible to Create an Expanded Deck Now?

So, I took a couple months off only to be greeted by this sunset and new TCG online. As terrible as it is compared to the old game, why does it keep saying my expanded deck contains banned cards when I checked the banned list over and over and it does not? I don't get it. To make matters worse, the game doesn't even tell you which cards it is flagging as "banned". Anyone able to help? I am trying to recreate my Muk Tag Team Poison deck. Thanks for any help!