World: Excalibur
Character: Me + 4 other FC members
All of us playing from PC

Same issue with us too. Every time we queue for the dungeons (specified + roulette), we get the 90k/3k error.
We all decided to log back in + waited for some time before queuing for dungeons and got crashed.
This is like, our 5th or 6th kick from the server.
I guess the Dungeon server is just dead.