UPD: FIXED :)
Sad to hear that :(
What browser have you used? There might be some issues with safari. Chrome and firefox are recommended.
Have you tried "pure" browser (https://fbtcg.azoriankings.com/) or facebook version (https://apps.facebook.com/clash-of-cards/) of the game?
Please write me! I want to find this issue more than any player :)
There might be some issues because of the last update in the game. I am polishing it.