This article covers unexpected Blizzard Update Agent errors.
Troubleshooting steps for linking a Twitch.tv account with a Battle.net account.
Your account is unable to log into Blizzard services.
This error means Battle.net Agent (the process that installs and patches our games) couldn't stream necessary files.
Before you can connect to the game servers, you must add a phone number to this account.
Failed to extract required files from an archive. Please try again.