he client you are using to log in to the game is out of date or there is a mismatch between the client and server versions

What to do if the Battle.net desktop app is stuck in a Scan & Repair loop

Whoops! Looks like something broke. Give it another shot.

Info article detailing how to turn off a network proxy.

Failed to extract required files from an archive. Please try again.

Failed to extract required files from an archive. Please try again.

If your antivirus software detects a virus in a Blizzard game folder, the detection will most likely be a false positive.

Information on error BLZBNTAGT0000138F

Information on the error BLZBNTAGT00001389

Failed to download a required update. Please check your internet connection and try again.