If you receive this error message, it means World of Warcraft lost its connection to the server.
This page details the video cards and drivers that are supported for use with World of Warcraft.
Slow and choppy gameplay in World of Warcraft.
Basic troubleshooting for WoW crashing and freezing issues
Troubleshooting an issue where Malfurion will not allow access to Cenarius in the Emerald Nightmare.
You might be in a raid group! We also have some other steps to fix this issue.
Information on error code WOW51900101
What to do if you are missing the achievement "Heroic: War is Hell" after winning a warfront and completing the quest.
Troubleshooting error "Unable to start up 3D acceleration" in World of Warcraft
Information on Cannot Stream Required Archive Data error.