Game error/crash

Dear Staff, I started playing yesterday and now I'm stuck nearby the Orgrimmar City gates, I was walking to complete a quest and everything crashed. When I tried to log in again it crash again, I do also have the screenshot. Can you please helpe me?
If you need more information please let me know. ;)

EDIT: I tried to unstyck the character by the tool on the website and meanwile I was walking to rech the Barrens (so opposite way) it give me the same problem. I do also have a screenshot of the error message.