Continuous disconnect when entering Thornmarsh (Hard) Error 90002

Hello,

Every time I attempt to enter Thornmarsh (Hard) via Duty Finder, I get disconnected, error 90002. Every attempt to reconnect and enter the instance again disconnects me. The only time I actually get back into the game is when the Duty times out or I get removed from the party and get sent back to my place in the main world.

I'm a returning player that didn't play HW, but did finish ARR right before early access, so doing Thormarsh is mandatory to advance the MSQ. This is highly frustrating. Please fix.