I had this same issue, looking at the logs it said one of my cards was throwing a validation error, with an invalid card ID. I went through and started pulling cards out to see what could be throwing the error, turns out it was my John Avon Mirage Mountains (supposedly, card grpid 7153). I swapped them out with different mountains, and got in no problem.
I had this same issue, looking at the logs it said one of my cards was throwing a validation error, with an invalid card ID. I went through and started pulling cards out to see what could be throwing the error, turns out it was my John Avon Mirage Mountains (supposedly, card grpid 7153). I swapped them out with different mountains, and got in no problem.