I tried dueling again and again and went back, but it kept saying the same thing. After about the third try when I went to the shop page it said I had been disconnected, even though the rest of the game still seemed to work fine. I logged out and back in again, and decided to try one last time, and finally I got it to work. This morning now though it says I already got my card for the day. My main account where I did the pull before midnight though I got another card from.