From what I've read online, this is a common occurrence on many blue ray players. The AACS keys expire every 12-18 months and require an update if you want to

From what I've read online, this is a common occurrence on many blue ray players. The AACS keys expire every 12-18 months and require an update if you want to play any movies with newer keys. I don't know how this is handled on older, unconnected players.