I know this message has erroneously popped up for people in various situations over the years but this is the first time for me. I’ve tried the multiple work arounds I’ve seen previously with no luck.
I mess around with odd deck creations in “expert” practice mode in between customers while I’m at work. The standard highlander quest priest deck, with 30, non-gold singletons causes this error. After the I hit the “play” button, the select an opponent’s class options show up on the right and I select one, hit the “play” button again, the “rolling” sound of a game selecting an opponent starts and then the hero portraits on the “select an opponent” column on the right side of the screen turn a bright pink and the error message pops up.
The deck works just fine on ladder. Thoughts?