Connection to Blizzard game server has been lost, BLZBNTBGS000003F8

In this article, we will show you how to fix the Connection to Blizzard game server has been lost error on PC Windows 11/10. Battle.net is a desktop game launcher application using which you can install, update, and play Battle.net games on a Windows PC. However, you can encounter errors and bugs just like any other software or application.

One of these errors includes “Connection to the Blizzard game server has been lost.”The error is accompanied by the error code BLZBNTBGS000003F8. Once triggered you will get the following error message:

Connection to the Blizzard game server has been lost. Please exit and try again.
Error code: BLZBNTBGS000003F8

This error is mainly reported by Call of Duty players. Now, if you’re one of those users facing the same error, we’ve got you covered. In this guide, we are going to mention several fixes that helped affected users to resolve the error. You can also try these fixes and eliminate the error.

What Causes Blizzard Game Server Connection Loss Error?

Here are the reasons why you might encounter the error Connection to Blizzard Game Server has been lost on Battle.net:

  • One of the main causes of this error can be server issues. So you need to make sure that the Blizzard Battle.net servers are not down. If the servers are down, you will have to wait for the error to be resolved on the server side.
  • Your firewall could also be one of the reasons why you are getting this error. If your firewall is blocking the connection between your system and the servers, you should be able to resolve the error by allowing the game to pass through your firewall.
  • Another cause of this error may be network issues on your PC. You can try performing a network reset to correct the error.
  • Inconsistencies with your DNS server can also trigger the error Connection to Blizzard game server has been lost. Therefore, you can try switching to another reliable DNS server like Google DNS server to resolve the error.
  • The error can also be caused by outdated or faulty device drivers, including network drivers. If the scenario applies, you can try updating your drivers to correct the error.

Now that you know the scenarios that trigger the error, you can try a suitable fix to resolve the error.

Connection to Blizzard game server has been lost, error BLZBNTBGS000003F8

Here are the methods you can use to correct the Connection to Blizzard game server has been lost, error code BLZBNTBGS000003F8 on Windows 11/10 PC:

  1. Make sure the server is not down.
  2. Allow your game to run through Windows Firewall.
  3. Perform a network reset.
  4. Use Google’s DNS server.
  5. Update your device drivers.
  6. Try a VPN.

1]Make sure the server is not down

This error can be very much facilitated due to a server problem. There may be a server overload issue or the server may be under maintenance. So make sure that the Blizzard game servers are up and running and that the error does not occur due to server issues. You can check the server status of the Blizzard Server using a free Server Status Monitor.

If you find out that the error is being triggered due to a server problem, there is nothing you can do to correct the error. Just wait a while and the error should be fixed on the server side. However, if it turns out that the servers are up and running, there must be some other issue that caused the error to occur. Therefore, move on to the next potential fix to resolve the error.

Read: How to increase Battle.net download speed on Windows PC?

2]Allow your game to run through Windows firewall

This error can be caused if you are using an overprotective antivirus or firewall. Your firewall may block or hamper the connection between your PC and Blizzard game servers. So, to check if your firewall is the main culprit, try temporarily disabling your firewall. After that, check if you encounter the same error on Battle.net or not. If the error is gone, you can be sure that your firewall is the one that caused the error.

Now when you find out that your firewall is triggering the error, you can try to allow the game to run through Windows firewall. Here are the steps to do it:

  1. First, press Windows keyboard shortcut + R to open the Run dialog box and then enter firewall.cpl in to open the Windows Defender Firewall window.
  2. Now press the Allow an app or feature through Windows Defender Firewall option in the left pane.
  3. Then press the Modify the parameters button then click on the Authorize another application … button.
  4. After that, browse and add the Battle.net executable and BlackOpsColdWar.exe files to the list of allowed apps and features.
  5. Next, select the added apps and then check the Private and Public boxes.
  6. Finally, press the OK button to save the changes.

You can now try to relaunch Battle.net and open your game to check if the error is fixed or not. Likewise, you can also check if your antivirus is causing the problem and then add Battle.net and the game to your antivirus exceptions or exclusions list.

If the problem is not with your firewall, you can try the next potential solution to fix the error.

Read: Fixed connection error, glitches and issues with Epic Games

3]Perform a network reset

You can also try performing a network reset, as the error might be due to a network issue. Here are the steps to do it:

  1. First, open the command prompt with administrator privileges.
  2. Now type and enter the following commands in the order below:
    netsh winsock reset
    netsh int ip reset
    ipconfig /release
    ipconfig /renew
    ipconfig /flushdns
  3. When all commands are completed successfully, you can restart your PC and open the game to check whether the error is gone or not.

If the error persists, you can move on to the next potential fix to resolve the error.

See: Correct the VALORANT VAN 135, 68, 81 connection error codes on a Windows PC.

4]Use Google’s DNS server

The error “Connection to Blizzard game server has been lost” can also be triggered if there is an inconsistency with your default DNS server. Therefore, if the scenario applies, you can switch to a more reliable public DNS server. Many affected users were able to correct the error by switching to Google’s DNS server. So, you can also do the same and check whether or not that fixes the error for you.

To switch to Google DNS Server, you can try the steps below

  1. First, press Windows + R to bring up the Run dialog box.
  2. Then type ncpa.cpl in the Open field, then press Enter to launch the Network Connections window.
  3. Now just select and right click on your active connection and then press the Properties option.
  4. Then select the Internet Protocol Version 4 (TCP / IPv4) option, and then press the Properties button.
  5. After that choose the Use the following DNS server addresses then use the following addresses in the respective fields:
    Preferred DNS server: 8.8.8.8
    Alternative DNS server: 8.8.4.4
  6. Now to save the changes click on the OK button.
  7. Finally, relaunch the Battle.net client and reopen the game to see if the error is fixed or not.

If you are not facing DNS server issue, you can try the next potential solution to fix the error.

5]Update your device drivers

If the error is still not resolved using any of the above methods, the problem may be with your device drivers. There are chances that corrupted or outdated drivers, especially network drivers, is the cause of the current error. In this case, you should be able to correct the error by updating your network drivers. After updating the device drivers, restart your PC and then check if the error is resolved.

Read: Fixed an interrupted connection error in COD Black Ops Cold War.

6]Try a VPN

If none of the above solutions have given you any luck, you can try using a VPN. As confirmed, some ISPs are having trouble connecting to Blizzard and Battle.net servers. In this case, you should be able to correct the error by using a VPN client on your PC.

How to fix BLZBNTAGT00000BB8?

To fix the error code BLZBNTAGT00000BB8 on Battle.net, you can try to disable your antivirus which might be interfering with the Battle.net game launcher. If that doesn’t help, you can try using an optimal internet connection, clearing the DNS cache, disabling the proxy or VPN, reinstalling the problematic game, or reinstalling the Battle.net client.

That’s it.

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Connection to Blizzard game server has been lost, BLZBNTBGS000003F8


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