WoW Error (cant play the game)

Hello, so i tried to launching World of Warcraft Wrath of the Lich King and when i got to Creating my character, game freezes and error popped up. It says this:

"Failed to read file
Item\TextureComponents\LegUpperTexture\Leather_A_0 5Yellow_pant_LU_M.blp"

I dont know what to do with it, help would be appreciated.

delete that client.

go here: https://www.warmane.com/download > and select "wotlk (old)"

I have already installed the old version of Wrath of the Lich King.