I think the first message - a real game message not a code error - was the one about mixed column and uncovering? I'd seen it once before and had no idea if I should select Yes or should select No but did recall I hadn't liked the result and again wasn't sure what to select. I don't think I clicked Yes or No this time, I think I clicked on the cards again.
The second message was from code, something being undefined, and the third message I'm sorry I don't recall, that was up quickly I think and suddenly the game ended as an Abort.
UPDATE: now I see there are two messages, one is mixing and one is combining, so I can't say which it was. And btw I find them both confusing, and don't know why combining only sometimes appears when combining.