How to Fix Dev Error 6634 Xbox Series X & PC? Simple Guide

The Warzone Dev Error 6634, Error Codes 5573 and 6635 appeared following the January update. No prior reports of any of the three faults have surfaced, suggesting that they are linked somehow. Although the dev error 5573 is more common on PS4, Xbox One, and PC, all error codes can be seen on any platform.

Warzone and Cold War were mistakenly combined, which is why the problem occurred. The codes don’t seem to synchronize, especially when it comes to in-game stuff and cosmetics. Errors occur in so many different situations that it’s impossible to pinpoint a specific reason. 

However, there have been a few confirmed examples of the inaccuracy. Keep reading to learn more about Dev Error 6634 Xbox Series X and whether or not a fix is available.

Causes of Warzone Dev Error 6634 Xbox Series X

Watch item Glitch

  • It turns out that the Stitch operator and any Cold War watch can cause the game to crash if they are both equipped. When writing this post, the problem has yet to be fixed. To avoid the conflict that triggers the error code, you may only remove the Watch from your system.

Multiplayer Pack 2 or 3 Causes the Issue (consoles)

  • A flaw in the partial install functionality present on both the Xbox Series X and S and the Playstation 5 is causing this problem. To fix the problem, it’s likely that the incorrect installation of Multiplayer Pack 2 and Multiplayer Pack 3 is to blame.

Battle.Net Cache Corrupted (PC)

  • Cache corruption may cause issues with the PC version of the game after downloading it from Battle.Net. After clearing the launcher cache, several previously impacted customers have indicated that the problem has been resolved.

Shaders were Installed Incorrectly (PC)

  • An incorrectly installed shader component is another common cause of this dev error on PCs. If you’ve recently upgraded your graphics card, this is a possible outcome (or added GPU as part of an SLI setup). Reinstalling the game shaders from the Options menu in COD will fix this issue.

Bundle Glitch in the COD Series

  • If the problem affects Warzone, it’s possible that a conflict between files from different parts of the game is to blame (Zombie Mode, Single Player, or Multiplayer). Some users who were experiencing this issue reported that they could resolve it by removing their COD bundle and reinstalling Warzone separately.

In light of the information you’ve gathered about the many causes of the Dev Error 6634 Xbox Series X appearance, below are a few workarounds that other players have found effective in getting the game to run smoothly.

Quick Methods to Fix Warzone Dev Error 6634 Xbox Series X

You may see error codes while playing Warzone on your mobile device for various reasons, as previously mentioned. Any solution must be based on an understanding of what’s causing the issue in the first place. If none of those suggestions work, here are a few other options:

  • New firearms should not be used with new operators, or new stuns/flash. It’s best to avoid using Black Ops Cold War operators and load-outs in favor of MW ones.
  • You can set the Watch to either None or Cold War as an alternative.
  • In-game items like animated calling cards, the CW operator skin, claymore, and many others are said to trigger the dev error 6634 by several players. Even if they cause these problems, it does not necessarily mean so. Avoiding errors by figuring out what is causing them and not interfacing with the device is always preferable in these situations.
  • If you’re still encountering the Dev Error 6634 Xbox Series X, try to delete the Battle.Net Cache using Blizzard’s launcher. You can fix a corrupted cache with this method.
  • As the last step, go back to the app store and download MultiPlayer Pack 2 & 3 again.

How to Fix Dev Error 6634 Xbox Series X

Error code 6634 in Warzone was caused by using a favorited load-out with a Cold War weapon or skin. It is true even for the Cold War Watch. The error code can be triggered by interacting with specific in-game elements in rare cases. 

Dev Error 6634 Xbox Series X

If you can determine what causes the mistake and avoid interacting with it, you’ll be on your way to a quick and easy solution to the problem! Here are a few possible solutions to the problem.

Restart the Console

Even though the most simple repair is often overlooked, we see it all the time. Essentially, the computer that runs your console or PC is a complex system comprising many interconnected processes. A process can start-up in a strange way, but it’s not uncommon. 

It causes it to develop a problem, resulting in a generated malformed data set. As these issues spread, they can lead to sluggish gameplay and glitches across the entire system.

Restart your PC or PS4/PS5/Xbox to fix the problem. All procedures will function smoothly, and It will eliminate bugs. Avoid the default Standby Mode by adequately shutting down and restarting the console. Try rerunning Warzone after that.

UneQuip the watch Item

The Dev Error 6634 Xbox Series X is most commonly caused by the watch and operator combination; thus, remove the watch Item. Your best bet here is uninstalling the Call of Duty Modern Warfare watch gadget.

To accomplish this, you’ll need to follow these steps.

  1. To begin, open the game and select WEAPONS from the main menu.
  2. Select the WATCH SELECT option from the drop-down menu in the WEAPON menu.
  3. Then, from the left-hand side of the screen, select the “None” option and save the modifications.
  4. Take a moment to see if anything has changed.

Restart your Router

Warzone Dev Error 6634 Xbox Series X could result from a network issue on your end. After 30 seconds of powering off and then back on, you can restart your router—this aids in the release of network bandwidth and the removal of congestion. On the other hand, a wired Ethernet connection can minimize packet loss and latency.

Optimize your internet connection for online gaming by tweaking your settings. Log in to your router’s advanced settings via your ISP’s portal.

Enabling Quality of Service allows you to prioritize gaming traffic above less urgent tasks. Also, adjusting your NAT type from Strict to Moderate allows for better network access.

Repair Game Files

Warzone’s Dev Error 6634 indicates a problem with the integrity of the game files. As a last resort, you can scan and fix game files.

To accomplish this, you’ll need to follow these steps.

  1. Open the client to begin.
  2. To begin the repair process, pick Call of Duty: MW from the main menu and then, on the options menu to the Right, select Scan and Repair.
  3. Click on the Begin Scan tab in the Scan and Repair Installation window to begin scanning your computer for problems.
  4. To check that the issue has been fixed, restart the game.

Check for any Cold War or Modern Warfare DLC

According to specific theories, the warzone Dev Error 6634 Xbox Series X may be caused by a bug in crossover cosmetics. Because the three games are intertwined, the developers have made it possible for Warzone to use decorative skins and charms. 

It’s recommended to stay away from everything but the core game stuff if you run into this dev problem. Even though it may appear unfair, this is only a short-term remedy until the official developers release a permanent one.

Update Graphics Driver

Warzone’s Dev Error 6634 can also be fixed by updating your graphics driver. As a result, you’ll get the identical error message if your graphics driver is obsolete or faulty. To avoid the same problem, you must update your driver as soon as possible.

To accomplish this, you’ll need to follow these steps.

  1. Begin by performing a right-click on the Start button and then selecting Device Manager from the pop-up menu that appears.
  2. Select and expand the Display adapters option in the Device Manager window.
  3. After doing this, right-click on your graphics card and select “Update driver.”
  4. To verify that the problem has been resolved, restart the computer.
  5. You can also use third-party driver updaters to update the graphics driver automatically. You can find these tools online, and you can rely on one of them.

Switch to a Different Account

Try a different account if the Dev Error 6634 persists in the current one. Using a new account will allow you to compare your old and new accounts.

FAQs Related to Dev Error 6634 Xbox Series X

What causes a dev error?

A fault may cause the Dev Error 6068 error with your computer’s graphics settings or a lack of processing capacity. In addition, incorrect settings and configurations may also be the issue.

Why do I keep getting dev Error 6034 on Xbox?

Corrupted game files may cause the 6034 error, so you may be able to solve it by running a scan and repair. However, you must manually delete specific game files to guarantee that Blizzard obtains the current version: Open the Modern Warfare or Warzone installation folder.

How do I stop Dev error 6635?

You fixed the problem only after changing skins from Cold War to Modern Warfare. Cold War character skins appear to be the sole cause of dev error 6635, for whatever reason. As a result, the quickest option is to switch to a different skin – any skin other than Cold War should do.


Try the solutions listed above if you’re having trouble with Dev Error 6634 Xbox Series X. If you have any questions or concerns, please don’t hesitate to contact us. You can count on our team to assist you in any way they can.