We offer the most comprehensive guide on solving this error code available. Learn how to fix Modern Warfare errors, and get rid of Vanguard errors for good! We also reveal common causes, provide troubleshooting steps, and more.
The “dev error 5476 reddit” is a problem that has been present for a while. The issue affects Modern Warfare and Vanguard players. This guide will help you fix the issue.
The Dev Error 5476 in Modern Warfare & Vanguard is usually triggered while you are trying to connect to the game servers and the connection is being failed. Therefore, you can go through this guide which lists all the possible solutions and workarounds that you can apply to completely get rid of the issue. In addition to that, we have also listed the reasons due to which the issue occurs in the first place.
Modern warfare Dev Error 5476
What Causes the Modern warfare Dev Error 5476 on your Computer?
We are now able to disclose the reasons why the problem happened in the first place after having to go through the mending procedure for some of our consumers.
- Battle.net launcher is out of date: The Battle.net launcher may be out of date, causing the game to be unable to validate its connection to its servers. As a result, we recommend that you download the most recent version of the program or update it following the instructions below.
- Damaged Game Files: It’s conceivable that the game files have been damaged in certain cases. As a result, we recommend that you go through the article to learn how to restore these damaged files using the game file integrity check.
- Port Blocking: It is possible that the ports that the game is trying to use to communicate with its servers are being blocked by your ISP/router and that they haven’t been forwarded. You can easily forward these ports yourself using the solution that we have mentioned in regards to it and fix the Modern warfare Dev Error 5476 issue on your game.
- Cache files that have been damaged: Cache files that the game utilizes to speed up loading may be destroyed, resulting in an error while attempting to load into a game. As a result, we recommend that you remove this cache following the instructions below, and it should be immediately regenerated.
Now that you’ve gone through the majority of the causes for the problem, we can finally start putting the fixes in place.
Automatically Resolve PC Problems
If you want to have your PC problems instantly corrected as well as diagnose, list, and correct any registry flaws, we suggest utilizing the Restoro Repair Tool, which can handle all of this with just one click. Trustpilot has given it a 5-star rating, so you don’t have to be concerned.
Before you begin, consider the following:
- Due to normal maintenance or internet outages, Activision servers go down from time to time; consequently, you may check the status of the Activision server by clicking on this link.
- This error might be caused by a problem with your router or a problem with your internet service provider’s server if your internet connection is interrupted. Restart your router to repair the problem, and if the problem persists, call your internet service provider’s hotline.
- Many people said that removing the “Crossplay” option in Account Settings addressed their problem.
- Some customers said that uninstalling all of the Modern Warfare Game Modes from Battle.net’s “Modify Install” option cured their problem.
- Restarting your internet router, according to several users, should resolve the problem. Turn off your Wi-Fi router, detach it from the power outlet, and keep it turned off for 5 to 10 minutes to do this. After that, turn on the router and wait till all of the lights come back on before checking out a few websites to make sure the internet is operating properly.
How to totally resolve Dev Error 5476:
The first solution is to update Battle.net.
Many customers are experiencing this difficulty because they have an older version of the Battle.net program installed on their computers. Updating the application may help to resolve the issue, therefore follow the procedures below to properly update the Battle.net application:
Automatically Resolve PC Problems
If you want to have your PC problems instantly corrected as well as diagnose, list, and correct any registry flaws, we suggest utilizing the Restoro Repair Tool, which can handle all of this with just one click. Trustpilot has given it a 5-star rating, so you don’t have to be concerned.
- Launch the “Battle.net” application and select the “Blizzard” logo in the window’s upper left corner.
Accessing Blizzard Icon On Battle.net - Select the “Game Install/Update” option from the “Settings” menu, scroll down the list, and check the option “Apply latest updates and download future patch data for recently played games”.
Clicking On Game Install/Update On Battle.net - To test whether the issue has been resolved, restart the game after hitting the “OK” button.
Solution 2: Use Battle.net to repair game files
Certain antivirus software flags game files as suspicious, classifying them as viruses or infected files, and removing them from the computer as a preventative measure. This issue may be repaired by using the Battle.net client’s built-in utility to repair the game’s files, so follow the instructions below to scan and repair your game files:
- Launch the “Battle.net” client, locate “Call of Duty: MW” in the left pane, select the “Options” button, then choose the “Scan and Repair” option from the menu.
Scan and Repair - Click the “Begin Scan” button on the Scan and Repair Installation prompt box, then wait while the program discovers and patches any damaged or missing files in your game.
- Start the game when the repair procedure is finished to see whether the problem persists.
Solution 3: Run the game as a superuser.
- Firstly, navigate to the game’s installation folder, locate the “ModernWarfare.exe” file, right-click on it and select the “Properties” option.
Accessing COD:MW Properties Option - In the game’s properties window, click on the “Compatibility” tab, check the option “Run this program as an administrator” located at the bottom of the window and then click on “Apply” followed by the “OK” button.
Run Program As An Administrator - Replace the “Modern Warfare Launcher.exe” file in the same folder with the “Modern Warfare Launcher.exe” file.
- Afterwards, locate the “Battle.net” folder that’s located in the file path “C:Program Files”, find the “Battle.net.exe” file, right-click on it and select the “Properties” option.
Accessing Battle.net Properties Option - In the properties window, click on the “Compatibility” tab, check the option “Run this program as an administrator”, click on “Apply” and then the “OK” button. Run Program As An Administrator
- Replace the “Battle.net Launcher.exe” file in the same folder with the “Battle.net Launcher.exe” file.
- Now navigate to the “Modern Warfare” installation folder, open the “Data” folder, in the next window, again open another “Data” folder, order the files by category “Size” and “Delete” all “0 kb” or “1 kb” data files mostly named “data.256, data.257″ etc.
Accessing Data Folder - Check whether the problem has been fixed by restarting your computer and launching the game as administrator.
Solution 4: Delete the Cache Files in Windows
- In the Run dialogue box, click the “Windows + R” keys simultaneously, input the following command, and hit the “Enter” button:
temp 
Typing In Temp
- The temporary files folder in Windows will appear in front of you; pick all of the files in that folder and click “Delete.”
- After that, restart your computer to see whether the problem has been repaired.
Solution 5: Verify the Game Cache’s Integrity
Because viruses may harm game files and antivirus software can incorrectly delete them, the steam client can also be used to validate the authenticity of the game file. Follow the steps below to verify the integrity of game files:
- Right-click on the “Call of Duty: MW” game in the “Steam” application’s “Library” area and choose the “Properties” option.
- Choose the option “Verify integrity of game cache…” from the “Local Files” tab and when the process is complete, launch the game and check if the Modern warfare Dev Error 5476 issue has been fixed.
Verify integrity of Game Cache
Solution 6: Make your calling card less random.
- To begin, launch the game, head over to the “Multiplayer” mode, access the “Barracks” tab, afterwards select the “Customizations” option and then click on the “Identity” option.
Accessing The Barracks Tab In COD:MW - Click on the “Calling Cards” option, choose one of them, and select the option other than “Randomize All”.
Selecting Calling Cards In COD:MW - Now click on the “Emblems” option, choose one of them, and select the option other than “Randomize All”.
Selecting Emblems In COD:MW
7th Solution: Delete the Appdata Folders
Some customers stated that removing the contents of the Modern Warfare / Warzone Appdata folder from the Windows disk resolved their problem; consequently, to remove the Modern Warfare/ Warzone folder, follow the procedures below:
- In the Run dialogue box, click the “Windows + R” keys simultaneously, input the following command, and hit the “Enter” button:
%appdata% 
Typing in %appdata%
- Locate the “Modern Warfare/ Warzone” folder, right-click it, and then choose “Delete.” Restart your computer to see whether the issue has been resolved.
Solution number eight is to reinstall the game.
If none of the above ways work, you may want to try reinstalling the game; to do so, follow the steps outlined below.
- Launch the “Battle.net” application, locate the “Call of Duty: MW” game icon from the “All-games” tab and select the option “Uninstall Game” from the options menu.
Uninstalling Call Of Duty Modern Warfare - Wipe any residual data from the game’s installation folder once it has been entirely removed from your PC, and then install the game from the Battle.net main menu.
Xbox Users’ Solutions:
Solution 1: Configure the router to use a static IP address.
Users of the Xbox One:
- Navigate to your console’s “Settings” option and then proceed to the “Network Settings” option from the menu.
Accessing Network Settings On Xbox One - Choose the “Advanced Settings” option, afterwards select the option “IP Address” from the menu and then note down the IP and MAC address from that window to use it for setting up static IP on your router.
Accessing Advanced Settings On Xbox One - Open your browser and put the following IP address into the address bar, then log in with your username and password to see the router settings.
192.168.1.1 
Typing In Browser’s Address Bar
- After successfully logging in, proceed to the “Settings” option in the left pane, enable the “Manual Assignment” option, afterwards enter the “IP” address, “MAC” address that you noted down in Step-2, and then click on the “Add” button.
Accessing Router Settings Option - Now try playing the game in multiplayer mode to see whether the problem has been repaired.
Enable port forwarding as a second option.
- To log in, open your browser, put the following address into the address box, and then enter your sign-in credentials.
192.168.1.1 Typing In Browser’s Address Bar
- The router settings window will appear in front of you, navigate to the “Advanced Settings” option, access the “Port Forwarding” setting, and enter the range of ports you want to open in Start and End.
Accessing Port Forwarding Option - For the modifications to take effect, enter the console’s static IP address, choose the “Enable” option, and then restart your console and Wi-Fi router.
Reset your console as a third option.
Users of the Xbox One:
- While your console is still powered on, press and hold the “Power” button until the power light turns OFF.
Pressing Power Button - Unplug the cables from the outlet, wait 5-10 minutes for the capacitors to discharge all power, then turn your console “ON,” run the game, and see whether the problem has been resolved.
Users of the Xbox Series X/S:
- While on the home screen, press the Xbox logo button on your controller, then go to the “Profile and System” tab, pick the “Settings” option, then find and select the “All Settings” option.
Accessing Profile And System - In the “Device and Connections” tab, select the “Blu-Ray” option from the list, afterwards, select the “Persistent Storage” option and pick the “Clear Persistent Storage” option.
Accessing Device And Connections Option - Verify if the Modern warfare Dev Error 5476 has now been fixed.
Reinstalling the game is the fourth option.
- To begin, press the Xbox logo button on your controller while on the home screen, then navigate to the “My Games & Apps” tab, scroll down through the list of installed applications, locate “Call of Duty: Modern Warfare” and press the “Start” button on your controller.
Accessing My Games And Apps - A new window will appear in front of you, select the “Manage Game” option from the menu, after that, select the “Uninstall All” option and then follow the on-screen instructions to uninstall the game completely including add-ons.
Selecting Uninstall All Option - Restart your console when the game has been entirely removed, then go to the “Microsoft Store” from the home screen, enter “Modern Warfare” in the search box, and choose it from the results.
- Finally, choose “Install” and follow the on-screen directions to download and install the game on your console.
- Check if this fixes the Modern warfare Dev Error 5476 issue.
PlayStation Users’ Solutions:
Solution 1: Configure the router to use a static IP address.
Users of the PlayStation 4:
- Firstly, navigate to the “Settings” option from the home screen of your console, locate the “Network” option from the list, and in the next window, select the “View Connection Status” option.
Accessing View Connection - In the connection status box, write down the IP and MAC addresses so you may use them to set up static IP on your network.
- To access the router settings window, open your browser, type the following IP address into the address bar, and then log in using your username and password.
192.168.1.1 Typing In Browser’s Address Bar
- After logging in, navigate to the “Settings” option in the left pane then, locate the “Manual Assignment” option, afterward, enter the “IP” address, the “MAC” address that you noted down in Step-2, and then click on the “Add” button. Accessing Router Settings Option
- Finally, after you’ve successfully set up the static IP on your router, test the multiplayer feature by launching the game.
Reset Your Console (Second Option)
- Turn off your PlayStation while it is still powered on, press the “Power” button until the power on the light turns “OFF”, unplug the cables from the power source and wait 5-10 minutes for the capacitors to discharge completely.
Turn OFF PlayStation - Switch your console back to “ON” and then start the game.
- Check to see whether the Dev Error 5476 in Modern Warfare 2 has been resolved.
Reinstalling the game is the third option.
- Firstly, navigate to the “Settings” option located at the top right corner of your console home screen, and afterwards, select the “Storage” option from the settings menu.
Selecting Storage Option - In the storage window, select the “Games and Apps” option, afterward, locate the Modern Warfare game and choose the “Delete” button located at the bottom right corner of your screen.
Selecting Games And Apps Option - When the game is fully uninstalled, restart your console, afterward, navigate to the “Game Library” section from the home screen, in the “Your Collection” tab, locate the game and select the option “Download/Install”.
Accessing Your Collection Tab - Wait for the game to finish downloading/installing before starting it.
- Check to see whether the Dev Error 5476 in COD: Modern Warfare has been resolved.
Get in touch with Activision Support.
If none of the above-mentioned fixes works for you, Get in touch with Activision Support. for comprehensive troubleshooting.
If you’re still having trouble, please Contact Us for help.
The “dev error 5479 vanguard” is a problem that has been present for a while. Microsoft has released an update to fix the issue.
Frequently Asked Questions
How do I fix Dev error 5476 multiplayer?
A: The error 5476 is due to servers being too busy, so you may need to wait a little while before the game will be back online.
What is Dev error 5476 Modern Warfare?
A: Your Internet connection is too slow.
Why do I get Dev error 5476 Warzone?
A: This usually occurs when you have run out of memory. It is recommended to close other programs and see if this fixes the issue.
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