Fixing App Error BLZBNTBGS00000002 or BLZBNTAGT00000870

Seeing those strange error codes BLZBNTBGS00000002 or BLZBNTAGT00000870 pop up on your desktop client can put a real damper on your gaming time. But don’t pull your hair out just yet! By methodically working through a few troubleshooting techniques, you can likely get the PC client working properly again.

Follow this detailed guide to solve those pesky error codes!
Abdul Barie/Unsplash

How to Troubleshoot and Fix Issue with Error Code BLZBNTBGS00000002

The BLZBNTBGS00000002 error typically appears when the app is having issues connecting to Blizzard’s gaming servers. The error message on your computer screen might look like “Connection to the Blizzard game server has been lost. Please exit and try again. Error Code: BLZBNTBGS00000002.”


Here are several things you can try to fix it:

  • Force quit out of the desktop app by right clicking it in the system tray and selecting Exit. Then launch again to reset all connections. This clears any cached connection errors.
  • Temporarily disable any antivirus, VPN, or firewall software you have running. Sometimes security products will block executables like from accessing the network. Add as an authorized program if needed.
  • Be sure to launch the app with full administrative privileges. Right click the icon, choose Run as Administrator, then open This resolves some potential permission issues.
  • Clear out the cache to delete any corrupted data. In the Settings menu, go to the Game Install/Update section. Click on the Clear Cache button to wipe the slate clean.
  • Check that all your Blizzard games like Overwatch, World of Warcraft, and Hearthstone are fully updated with the latest patches. Outdated game clients can prevent connecting to
  • Scan your computer for malware just in case viruses or spyware are interfering with the app. Use a thorough scanner like Malwarebytes to find and remove any nasty infections.
  • As a last resort, uninstall and reinstall the desktop app. Download the latest verified version from Blizzard’s website for a fresh start.
  • If all else fails, contact Blizzard support. They can help troubleshoot connection issues between your system and Blizzard’s servers.

Workarounds to Fixing Error Code BLZBNTAGT00000870 on PC

The BLZBNTAGT00000870 error indicates there is a problem authenticating your login credentials with Here’s the error message that comes with it “We need your permission to continue. Try again and when desktop app or Update Agent asks for permission, please grant it. BLZBNTAGT00000870.”


Follow these tips to resolve it:

  • Restart your computer to refresh the network services and clear any memory issues affecting A clean reboot can work wonders.
  • Double check that your system clock is set to the correct date and time. If it’s off, this can definitely cause authentication problems.
  • Log out of the app completely, then log back in with your username and password. This will force a fresh authentication request.
  • Make absolutely sure your antivirus and firewall software are not blocking the executable from making outbound connections. Add an exception if needed.
  • Try using a different internet connection, like tethering your mobile phone, to rule out any network restrictions blocking
  • Reset your password if you have any concerns about it being compromised. Be sure to enable Blizzard’s two factor authentication for extra security.
  • As a last ditch effort, uninstall entirely and grab a clean installer from the Blizzard site. Fully deleting old files can resolve lingering issues.

Getting Expert Help from Blizzard

If you still can’t get the app working after exhausting your troubleshooting options, it’s time to bring in the pros at Blizzard support:

  • Search Blizzard’s comprehensive online knowledge base for your specific error code. They have detailed troubleshooting guides for many common problems.
  • Open a technical support ticket through Provide any logs or diagnostics the agents request to speed up troubleshooting.
  • If available in your region, call Blizzard’s customer support hotline. Talking through the problem in real time can help.
  • Reach out on Twitter or Facebook to @BlizzardCS. Their social media teams can assist with issues.
  • For severe errors, Blizzard may be able to transfer your account to a different data center or perform account investigations.

Hope this helps you fix the issue and get back to your online gaming in no time at all!

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *