Okay, so I've just recently collected all the pieces to the uncharted land map and I was trying to vend at Ocean Depths but I keep getting a fatal error. But when I try any of the other vending machines, they work just fine. Has this happened to anyone else, and does anyone know how I can fix this?

Yep. Just tried it myself and got the error message. I also checked the Problems and Bugs forum and there's a couple threads about it, so maybe it's just glitchy atm?

Ah! Thank you so much! This clears up a lot!