The above unexpected errors occur when there is a critical, unresolvable issue with your game client. To troubleshoot it, follow the steps below.
Run the repair tool to repair any damaged game files.
If the problem persists, uninstall and reinstall the game.
If these steps do not resolve your issue, please make a post on our Technical Support Forum (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) (Heroes of the Storm) and be prepared to furnish your Battle.net logs. Our developers will use these log files to identify where the operation failed and to improve the Battle.net Desktop Application.