This occurs because your game client does not match the version on our servers.

Warcraft Remastered Battle Chestシリーズでプレイヤーのチート行為を通報する方法

What to do if you can't log in after patching WoW

For issues purchasing WoW Token with gold.

How to reset the World of Warcraft User Interface

What to do if you want to swap the names between two of your characters.

You will receive this error if you attempt to purchase an item on an account with no game time.

ActivisionアカウントからGoogle認証コードを削除する方法について

You will receive this error if you attempt to purchase an item on an account with no game time.

How to launch multiple WoW clients on the same computer