How to Fix “Error Code: Diver” in Call of Duty Warzone?

Many users reported seeing Warzone error code Diver when the game was launched. The issue is mainly reported to occur on PC or PS4. In some cases, the issue is reported to occur after or during a game’s update. The following type of message is shown:

Warzone might show Diver error code due to many reasons but the following can be regarded as the core ones:

Network Issues: If the ISP is hindering the traffic essential for Warzone or if a router’s misconfiguration is restricting Warzone’s access to an essential online source, then Warzone may show error Diver.
Interference from the System’s Security Application: Interference from the system’s security products (like an antivirus or a firewall), that is blocking Warzone access to an essential online resource (or a local directory), may cause Warzone Diver error.
Corruption of Essential System Files: You may encounter Warzone error code Diver if the essential system files are corrupt (e.g., due to a sudden power failure). This can restrict Warzone’s access to a resource vital for its operation, resulting in the Diver error.
Corrupt Installation of Modern Warfare: Warzone might show error code Diver if its installation has gone corrupt. This might be due to the removal of essential game files as a false-positive from the security applications.

Relaunch Game or Restart the System/Console and Router

A temporary communication glitch might be causing the error code Diver in Warzone and performing a restart of the game, system, and router (which will also renew the system’s IP) may solve the problem. But before diving into more technical solutions, make sure the installation drive of Warzone has enough space available to download and install the game.

Firstly, close the game/launcher and right-click on Windows.
Now, select Task Manager and end all the processes related to Warzone/Modern Warfare.

Open the Task Manager of the System Through the Quick Access Menu
Then launch Warzone and check if it is working fine.

End Battle.net Process
If not, close the game and power down the system.
Now unplug the power cable of the system from its source and power down the router.
Then unplug the router’s power cable from its source and wait for 5 minutes.

Unplug Router from the Power Source
Now plug back the power cables to the respective power source and power on the router.
Once the router is properly powered on, power on the system, and once the system is powered on, launch Warzone to check if it is clear of the error code Diver.

Update the Warzone Game to the Latest Build

Warzone might fail to work if the game is not updated to the latest build as it can create incompatibility with other OS modules. Here, updating the Warzone game to the latest build may solve the problem.

Exit the Warzone game and make sure to end Warzone-related processes in the Task Manager.
Now open the Battle.net launcher and select Warzone.
Then expand its Options and click on Check for Updates.

Check for Call of Duty Warzone’s Updates
Wait till the update is applied (if any) and afterward, check if the error code Diver is cleared.
If not, check if letting the game shaders reinstall (when the error message is opened) solves the problem.

Change the Regional Server of Warzone

Warzone error Diver could be a result of a glitch in the regional server of the Modern Warfare and selecting a different region may clear the error Diver in Warzone.

Open the Battle.net launcher and select COD Warzone.
Now, click on the globe icon (near the Play button), and in the mini-menu, choose a different region (e.g., if you are in America, select Europe or vice versa).

Change Region in Warzone
Then click on Play and if the game asks to update, let it update.
Afterward, when the game is launched, check if Warzone is working fine without error Diver.

Try Another Network or Network Type

Warzone might show the error code Diver if the network is restricting the game’s access to a resource essential for Warzone. Moreover, an issue with a network connection type like a failing Wi-Fi card or interference with the wireless signals from other electronics-based equipment might also cause the issue. Here, you can fix the Diver error by trying another network or network type.

Firstly, exit the Warzone game and kill all of its related tasks in the Task Manager.
Now, connect the system through a VPN (if not present, you may install a VPN) and launch Warzone.
If the game tries to update, let it update, and then check if the Warzone is operating fine.
If not, check if using a different network type (e.g., if using a Wi-Fi connection, try an Ethernet cable, or vice versa) solves the problem.
If the issue persists, exit Warzone and end its related tasks in the Task Manager.
Now, disconnect the system from the current network and connect it to another network (like a phone’s hotspot).

Enable Hotspot of Your Phone
Then launch Warzone and if it tries to update, let it update.
Afterward, launch Warzone and check if the error code Diver is cleared.

Perform an SFC Scan of the System

You may encounter error code Diver in Warzone if the essential system files are corrupt which may make an essential resource or directory unreachable for Warzone. In this context, performing an SFC scan of the system may clear the Warzone error under discussion.

Exit Warzone game and end the related processes in the Task Manager.
Now, perform an SFC scan of the system (make sure to launch Command Prompt as Administrator). Keep in mind this may take some time to complete, so, try it when the system can be spared for some time (like overnight).

Perform an SFC Scan
Once the scan is complete, launch Warzone and check if it is clear of Diver error.

Disable the System’s Security Application

Warzone might not work or fail to update with error code Diver if the system’s security software (like an antivirus or firewall) is hindering the operation of the game and blocking its access to essential online sources as well as to local system directories. In this scenario, disabling the system’s security product (like ESET) may solve the problem. Before proceeding, make sure to remove any exemptions of Warzone in the antivirus/firewall settings (if added earlier).

Warning:

Advance at your own risk as disabling or editing the settings of the security application may expose the system and data on it to threats.

Firstly, exit the Warzone game and close its launcher. Do not forget to end the Warzone-related processes in the system’s Task Manager.
Then expand the hidden icons in the system’s tray and right-click on the security software (like ESET).

Pause ESET Protection and Firewall
Now select Pause Projection and if a UAC prompt is shown, click on Yes.
Then confirm to disable the security protection and agarin, right-click on the security product in the hidden icons of the system tray
Now select Pause Firewall and then confirm to disable the system’s security application.
Then open Battle.net and launch Warzone to check if its Diver error is cleared. If so, then you may exempt the Warzone installation directory in the settings of the system’s security application.
If not, repeat step 1 and then disable Windows Defender.
Now launch Warzone and check if it is working fine.

If the security product or system’s firewall (3^rd party or Windows Defender) was already disabled, check if enabling it resolves the Warzone issue.

Disable Static IP in the Router’s Settings

If Warzone servers are blocking traffic from the system’s IP, then that can cause Warzone Diver error at hand. Usually, restarting a router refreshes the IP but if the router is using a static IP, then that may fail and a user may keep facing Warzone error code Diver on his system.

Here, disabling the static IP in the router’s settings may solve the problem. The process may differ for some users. In some instances, a user might have to contact his ISP to disable or refresh the static IP. We will go through the general guidelines below. Keep in mind, disabling static IP may break other operations on the network or system.

Launch a web browser and steer to the web portal of the router (like 192.168.1.254 for BT Business Hub 2700/2701). You may have to enter your credentials.
Now head to the Settings tab and click on Broadband.

Open Link Configuration Tab in the Router’s Web Portal
Then steer to the Link Configuration tab and in the Public IP Address section, uncheck Enable for Add Additional Network. Do not uncheck Enable for Routing, otherwise, the router may stop working.

Uncheck Add Additional Network to Disable Static IP
Now apply the changes made and open Warzone to check if it is clear of the Diver error.

Reset Router to the Factory Defaults

COD Warzone might show the error code Diver if the router is not properly configured or if the router’s firmware is corrupt. In this context, resetting the router to the factory default may clear the Warzone error. Before moving on, make sure to note down the info required to set up the router after factory resetting it. Although the reset process for different make/models may differ a bit, the general guidelines will be as under:

First, locate the physical reset button on the router, usually, at the bottom or back of the router. In some routers, the power button also works as a reset button, if held for a certain time.
Once the reset button is located, press/hold the reset button with a pointy object (like a paperclip) and wait for 30 seconds.

Reset Your Router
Now release the reset button and wait till the router is powered on.
Then configure the router (as per the ISP instructions) and afterward, check if Warzone error code Diver is cleared.
If the issue persists, check if changing the NAT type of the system/console (by opening or forwarding the Warzone required ports) solves the Warzone problem.
If that did not work, you may set up a DMZ (strictly not recommended) for the system or console’s IP to clear the Warzone Diver error.

Delete the Contents in the Modern Warfare Folder

You may encounter Warzone error code Diver if the certain game configurations files (in the Documents directory) are corrupt or if the essential game files (in the installation directory) are corrupt. In this scenario, deleting the contents of the Modern Warfare folder in the Documents directory or the installation directory may solve the problem.

Delete the Contents of the Modern Warfare Folder in the Documents Directory

Firstly, exit the Warzone game and end the related processes in the Task Manager.
Then, right-click Windows and open Run.

Open the Run Command Box from the Quick Access Menu
Now, navigate to the following path:
```
Documents
```
Open Documents Folder Through the Run Command Box
Then open the Call of Duty Modern Warfare folder and delete all its contents (files, folders, etc.). If you want to play safe, then copy the contents to someplace safe. Keep in mind, on the relaunch of Warzone, these will be recreated with the default values.

Delete the Modern Warfare Folder in the Documents Directory
Now launch Warzone and if it asks to update, let the game update.
Afterward, check if Warzone is operating fine. If so, then you may paste back the old files (if backed up and required) to the Modern Warfare folder.

Delete the Files in the Installation Directory of Warzone

Open the Battle.net launcher and select Warzone.
Now, expand Options and click on Show in Explorer.

Show Warzone in Explorer
Then, steer to the Data folder, usually, the following path:
```
C:\Program Files (x86)\Call of Duty Modern Warfare\Data\data\
```
Open the Data Folder of COD Warfare Installation Directory
Now delete all the files with IDX extension up to 1KB in size.
Then open the Battle.net launcher and select Warzone.
Now click on the gear icon and select Scan and Repair.

Scan and Repair Warzone
Then wait till the scan process is complete and afterward, launch Warzone to check if it is operating fine.
If not, steer to the Warzone installation directory and open the Data folder.
Now delete the files (not folders) less than 2MB in size and Scan and Repair Warzone in Battle.net launcher to check if Warzone is clear of Diver error.
If the issue persists, delete all the files (not folders) in the installation directory except ModernWarfare and ModernWarfare Launcher.

Delete Files (not Folders) Except ModernWaarfare and Modern Warfare Launcher in the Installation Directory of Warzone
Now perform the Scan and Repair of Warzone in the Battle.net client.
Afterward, launch Warzone and check if it is clear of error Diver.
If the issue is still there, check if installing (or reinstalling) Modern Warfare Pack 1, 2, and 3 clear the Diver error.

Reinstall Warzone

If none of the above methods work, then the Diver error could be a result of the corrupt installation of Warzone that is beyond repair. In this case, the tedious and data-consuming task (100GB+ size download) of reinstalling Warzone may solve the problem. Before moving on, make sure to back up the essential data/info of Warzone.

Launch the Battle.net client and select Warzone.
Now, click on Settings and select Uninstall.

Uninstall Call of Duty Warzone
Then confirm to uninstall the game and wait till Warzone is uninstalled.
Now restart your PC and upon restart, reinstall Warzone.
Once installed, launch it as administrator and hopefully, it will be clear of the error code Diver.