This error usually occurs when your video drivers are corrupted or out of date. You may also receive this error if your computer does not meet the system requirements (World of Warcraft, StarCraft II, Diablo III, Hearthstone, Heroes of the Storm, Overwatch). Follow the steps below to resolve this issue.Note: This error is also occurring with some Linux-based installations using WINE.
Update your drivers to resolve any compatibility issues.
Restart the Battle.net desktop app to clear any stalled Agent processes.
Windows XP Users
Some hardware configurations on Windows XP are not supported. If the steps above did not resolve your problem, download this DLL file, and copy it to the newest Battle.net App version folder which is currently: C:\Program Files (x86)\Battle.net\Battle.net.7113.
Note: You will need to move this DLL file to the highest numbered version folder after each Battle.net patch.