Strange error message in Photoshop CS6

There's a problem with Photoshop CS6 where if I'm trying to save a photo, it will pop up with an error message that says "Couldn't save a copy of (file name) because the". That's it. It just ended with "because the" and wouldn't say why it wouldn't save. What does this mean and how can I fix this?

(Yes, I restarted Photoshop and the entire computer but it still gave the same message)