How to Fix COD Vanguard ‘Duhok Lester’ PlayStation Error?

The Duhok Lester error is a common issue many COD Vanguard players encounter while trying to play the game. The on-screen message suggests that a new update is required, without any real clues on how to get it. This issue has been mostly encountered on PlayStation consoles.

The main reason for this issue is usually a server/backend problem. However, you should check your internet connection for common issues. Another problem could be corrupted files affecting the game’s stability. This issue can sometimes be caused by a scenario in which the Activision account is not linked. 

Here is a list that contains every method you need to follow to fix the COD Vanguard Duhok Lester error:

1. Check the server status of the game

The first thing you need to do is to ensure that the servers are working properly.

The servers might be down due to ongoing problems or undergoing maintenance, which might be the reason for your Call of Duty Vanguard issue.

Start by looking at the official Activision page that shows the current server status. Look on the left side of the screen to see the status for all the platforms.

If the indicator says that there are ongoing problems, you can also scroll down and click on the button to see the PlayStation server status. 

For more information, you can also visit the official Twitter page for Activision and another one for Call of Duty. If there are ongoing server problems, you should be able to see posts related to them.

Read the posts and the comments to see what people are saying about it.

If you see that there are problems with the server at the current moment, the only thing you can do is wait until the developers fix it.

But if you are sure that the server is not the cause of the COD Vanguard Duhok Lester error, go to the next method below.

2. Update the game

If you’ve already restarted your router and the issue persists, the next method you should take is to ensure that the game version is up to date. This could happen because the update is still pending.

All you have to do is to check for the latest updates. Download and install if a new game version is available. 

Here’s how you can check for updates:

1. Select Call of Duty Vanguard on the home screen and press the Options button on your controller.
2. When the menu comes up, go to Check for Updates and press the X button. The process will start searching for updates and automatically install them if there are any.
3. After the updates are installed, launch the game to see if the Duhok Lester error still occurs.

3. Avoid Auto-Downloading the latest updates 

If the error is still occurring, another thing that could help is to turn off the Auto-Download feature for games. This features auto downloads and installs every available update released for the games you have installed. This could cause connection issues because the updates might come with problems and haven’t been patched yet.

This method is available for both the PlayStation 4 and PlayStation 5.

Here are the guides that will show you how to do it on both consoles:

3.1 Turn off Auto-Downloading on PlayStation 4

Follow the guide to see how to disable the Auto-Download feature on your PlayStation 4 console:

1. Use the controller to navigate to the Settings section, then open them.

   

2. Next, you need to select the System menu, and then access the Automatic Downloads section.

   

3. You must ensure that the Application Update Files option is turned off. If the feature is turned on, deselect it to disable it.

   

4. Restart your console and test the game to see if the problem was resolved.

3.2 Turn off Auto-Downloading on PlayStation 5

Here is how you can turn off the Auto-Downloading feature on your PlayStation 5 console:

1. Use the controller to navigate and select the Settings menu.

   

2. Scroll down until you see the Saved Data and Game/App Settings, then select it.

   

3. Select the Automatic Updates and turn off the Auto-Download feature.

   

4. After that, reboot your console and launch the game to see if the issue is fixed.

If the COD Vanguard Duhok Lester error still appears, go to the next method.

4. Link your Activision account

Another thing you can try if the issue is still occurring is to link your Activision account to your PlayStation account. Problems could be caused if the accounts are not linked, and it might affect the connection.

You can link the Activision account with the PlayStation account from the official Activision site.

Here is a guide that will show you how to do it:

1. Use any browser on your PC or mobile device and access the official Activision site to log in to your account.

   

2. When inside your account, look in the top right corner of the screen for the Profile button and click on it.

   

3. You need to click the Link Account button to link your PlayStation account.

   

4. Continue the process, and you will be asked to insert your PlayStation account.
5. After you insert your account, you should see that the button has changed to Unlink.

   

6. Launch the game on your console to see if the problem was fixed.

Check the next method if the COD Vanguard Duhok Lester error still occurs when trying to play.

5. Change MTU Settings on PlayStation consoles

The MTU (Maximum Transmission Unit) can also indirectly cause this error if a manual setting uses a protocol not supported by the game server.

To address this issue, ensure that the MTU Settings are set to Automatic on your PlayStation console. This could determine your connection capabilities and improve internet speed if the MTU Settings are set properly.

The default MTU Settings is 1500, but depending on your internet connection, it could work better if the settings are slightly lower. You should test it to see the ideal MTU Settings for you.

Here are two guides that will show you how to do it on PlayStation 4 and PlayStation 5 consoles:

For PS4:

Follow the next steps to see how to change the MTU Settings on your PlayStation 4 console:

1. Navigate using the controller to Settings and select them.

   

2. Now select the Network section and click on Set Up Internet Connection.
3. Choose your connection type, and then you must choose Custom to be able to change the MTS Settings.

   

4. Next, you need to click on the Automatic button, Do Not Specify, and Automatic again until you are asked about the MTU Settings. Choose Manual.

   

5. The MTU Settings should be set to 1500. Try to lower it by 25 and the internet connection to see if it will be better.
6. Repeat the process, and you can lower the number by 25 or set it back to default if that works best for you.
7. When you figure out the best MTU Settings, test the connection to ensure it is saved.
8. Now test the game to see if the problem was fixed.

For PS5:

Here’s how you can change the MTU Settings on your PlayStation 5 console:

1. Open Settings on your console using your controller.

   

2. Now you need to select the Network settings.
3. Go and highlight the Settings menu, and select the Set Up Internet Connection button.

   

4. Choose the internet connection you want, and you will see many options. Select the MTU Settings option.
5. Now try to lower it by 25 and test the internet connection to see if the speed has improved.
6. You can repeat the process until you find the best MTU Settings. You can also set the default number again if it works best, which is 1500.
7. Ensure that you saved the changes and test Call of Duty to see if the issue has disappeared.

If the COD Vanguard Duhok Lester error is still appearing even after doing this, check below the last method.

6. Reinstall Call of Duty Vanguard

If the problem persists, the last method on this list is to uninstall and reinstall the Call of Duty Vanguard game.

This will delete all the files of the game and reinstall them. This could resolve the issue, as some of the game files may have become corrupted.

Here’s how you can do this on your PlayStation console:

6.1 Reinstalling Call of Duty Vanguard on PlayStation 4

Follow the next instructions to see how to reinstall the game on PlayStation 4:

1. Start on your PlayStation 4’s home screen and go to the Library menu.

   

2. Choose Games on the left side of the screen, then move to the right side and highlight Call of Duty Vanguard.
3. Press the Options button and choose the Delete button to uninstall the game.

   

4. Once the game is completely uninstalled, please turn off your console, then turn it back on and install Call of Duty Vanguard.
5. After that, test the game to see if the COD Vanguard Duhok Lester error was finally fixed.

6.2 Reinstalling Call of Duty Vanguard on PlayStation 5

Here are the steps to follow to reinstall the game on your PlayStation 5 console:

1. Select Call of Duty Vanguard from the home screen of your PlayStation 5 and press the Options button.
2. Inside the menu that appears, select the Delete button and press OK to confirm the decision.

   

3. Once the uninstall is complete, restart your PS5 and wait until it reboots.
4. Next, go to the Library and install the Call of Duty Vanguard game.
5. After that, test if the COD Vanguard Duhok Lester error has been fixed.