Thank you for the feedback, this happens when there is an error with the next card you draw because of the combination with some other card in the game. I encountered this bug multiple times before publishing the game and fixed everything I found to be causing it, but it seems like I missed one in this case... I don't know which card may be causing the error, but it's probably an ability, since I added abilities only later on in the game and I didn't have much time to test if all of them worked properly with all other cards (given the almost infinite combinations of cards and abilities you can have in the game). I'll investigate onto this, if by chance you remember if you had any ability equipped and which ones they were it would be very helpful.
Thanks again for reporting this :D
Edit: the problem is now fixed starting from version 0.11