Hm well it didn't repeat when I did the scene again. I should have thought to taken a screenshot of the error when it happened.
Viewing post in Angelic Acceptor Alouette: VXA comments
There are a couple of key instability points in RPG Maker VXA that can lead to crashes. That particular scene has a lot of moving pictures that can get a little squirrely in RAM, especially if you've been playing for a while before it comes up. While the game is fairly well-tested at this point, it doesn't hurt to save often.