Can you fix this bug please?

Hello, I started a classic challenge and now I can not cancel it or lose the challenge because it does not find anyone, so I can not enter the one with personalized cards, can you solve please? My tag is #2GCCLR8PG . Thank you in advance

I’ve playing few minutes ago and there are players who also playing all of this challenges. So I don’t see any reasons to calling it as a BUG or smth. Maybe… at the time you were playing, there weren’t any players who also play this challenge.

Thank you