Error #123

How i resolve the ERROR#123
Yesterday(30/11/2015) appear this errorin my game and i like to know how i resolve it.


Thank You!

provide more info, like a screenshot of this Error's message
What expansions?
with WoD models or not?
it happens when you start the game?
as soon as you log-in or while you are playing?

http://i.imgur.com/01aKXvO.jpg
The expansion is Mists of Pandaria (NOT OLD)
I no know how but i resolve the problem of the ERROPR #123. But now i have a new error i no pass of the log-in screen.
And what is WoD i no know what is this.

you downloaded MoP with WoD models, so basically Character will have WoD "better looking" textures.
the "normal" MoP was "MoP (old)".
try to move away your MoP Folder from your Torrent-download destination

You say for me change the location of the folder of MoP to another folder alright?

you, like moving your MoP folder on the desktop or wherever you want