"Heroes cannot be in other teams" - This error pops.

TonyStark2020

How do I deal with this error? I am trying to join AW when this pops up. I have checked I dont have champs in any quest. I even checked Other difficukties of AW if they were locked in there, they weren't. Please help me here.

Winter_Fall

I'm having the same issue and none of my champs are in a quest