"Oh No! You don't have all of the scrolls in this set in your Scroll Library." is the message that I get when I try and battle with my default scroll set when I battle from the Challenger page. I can use my scroll set when I do Battle Quests though. I have tried in Chrome and IE. I also cleared my cache and restarted my browser and that did not work.
read through this thread, if that doesn't help, let me know.
that error isn't one I've heard before, but it sounds like you may have removed one from your scroll library but it's still in your set