Error in Wotlk loading screen

I'm getting error everytime I try to login or move to Northrend. My mage was in Azeroth, I tried to port to Dalaran and I'm getting an error in the loading screen everytime I'm trying to login. I unstuck, (my hs was in Orgrimmar and logged in just fine) then tried to port again to Dalaran and I'm getting the same error. The same thing happened when I tried with my alt who was in outland; when I hsed to Dalaran I got an error in the loading screen and keep getting error when I try to login (wotlk loading screen). Anyone else having this issue?




EDIT: Sorry forgot to say that the server is Lordaeron

try to disable all your Addons, also a screenshot of the Error would help