I have a Fairy Dance card that was in my deck that no longer loads up when I'm playing. It shows up as a blank blue area and is not selectable or playable in this state.
When I go to the File section to edit my deck, the card shows up as a placeholder picture (the back of the card). You can see what it does if you hover your mouse over it but it does not load its own picture. I'm able to remove it and put it back in but it remains unplayable in matches in this state.