Unexpected errors can happen due to outdated software, software conflicting with the game client, or corrupted game data.

Common Problems. I fell through the world and now I get disconnected when I attempt to access my character; I'm stuck in water and my game disconnects before I can move my character

Tried everything here? If the previous troubleshooting steps didn't resolve the problem, you can ask the Blizzard player community for help on the tech support forums (if available) or other …

In order to unlock the Legendary Cloak you will need to complete a number of pre-requisite quest, starting with (A) An Unwelcome Advisor or (H) Return of the Black Prince.