Game Crashes on Character in Storm Peaks

I was riding my mount into Storm Peaks when the game crashed and it gave me an error message. When I try to log in as that character now the game always crashes and gives me the same error message. I can log in as my other characters but not my main now.

use unstuck for that character:
From the website go into My Account>Services>Select Realm>Select Character>Set Currency:Free>Character Unstuck