Information on error BLZBNTBNA00000004

If you don't get any reward after completing the quest "A Savage Path Through Time"

Information on error BLZBNTBNA00000066

Receiving error BLZBNTAGT00000A2A

How to resolve the error "There was a problem restoring your deleted character. Please try again later." 

If you try to install a game that doesn't support your preferred language, the game will install the default language for your region.

Information on how to access hardcore servers in WOW Classic

Information on error BLZAPPAGT02600

What to do if your Guild Tabard was converted into a Emboldened Dracthyr's Tabard

When using the Crab Shank players can receive an invalid target error.