Fixes

Fix: Dev Error 5476 in Modern Warfare & Vanguard [Complete Guide]

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.

Dev error 5476 modern warfare
Dev error 5476 modern warfare

What Causes the Dev Error 5476 Modern Warfare on your Computer?

After having to go through the fixing process for some of our users, we are finally able to list the reasons due to which the issue occurred in the first place.

  • Outdated Battle.net: Sometimes, the Battle.net launcher might have been outdated due to which the game is unable to verify the connection with its servers. Therefore, we suggest that you install the latest version of the software on your computer or update it using the method below.
  • Damaged Game Files: In certain situations, it is possible that the game files have been damaged. Therefore, we suggest that you go through the article to repair these damaged files by performing the game file integrity scan.
  • 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 Dev Error 5476 Modern Warfare issue on your game.
  • Damaged Cache files: Sometimes, the cache files that the game uses to speed up its loading might have been damaged and this can cause the error while trying to load into a game. Therefore, we suggest that you clear out this cache using the steps below and it should get regenerated automatically.

Now that you have been taken through most of the reasons behind the error, we can finally start implementing the solutions for it.

Fix PC Issues Automatically
If you want to have your PC related issues fixed automatically and diagnose, list, and rectify any registry errors, we recommend that you try using the Restoro Repair Tool that can easily do all of this at a single click. It has been rated Great by Trustpilot so you don’t have to worry about anything.

Before You Start:

  • Activision servers go offline from time to time due to routine maintenance or internet outages, therefore you can check the status of the Activision server by clicking on this link.
  • If your internet connection is interrupted, you may encounter this error, that could be caused by a problem with your router or an issue with your internet service provider’s server. To fix this, restart your router, and if the issue continues then contact your internet service provider’s helpline.
  • Many users reported that disabling the “Crossplay” option in the Account Settings fixed their issue.
  • Some users reported that removing all the Modern Warfare Game Modes from the “Modify Install” option in Battle.net fixed their issue.
  • Many users suggested that restarting your internet router should fix the issue. For that purpose, turn off your Wi-Fi router, disconnect it from the power outlet, and leave it switched off for 5 to 10 minutes. Afterwards, switch on the router and wait until all the lights return to normal before exploring several websites to ensure that the internet is working effectively.

How to fix Dev Error 5476 completely:

Solution 1: Update Battle.net 

Many users face this issue due to the older version of the Battle.net application on their PCs, updating the application can be effective in resolving the problem therefore follow the instructions given below to fully update the Battle.net application:

  1. Launch the “Battle.net” application and select the “Blizzard” logo in the window’s upper left corner.
    Accessing Blizzard Icon On Battle.net
    Accessing Blizzard Icon On Battle.net
  2. 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
    Clicking On Game Install/Update On Battle.net
  3. Launch the game after clicking the “OK” button to see if the problem has been fixed.

Solution 2: Repair Game Files Using Battle.net

Certain antivirus software marks game files as suspicious, labelling them as viruses or infected files, and thus eliminates them from the computer as a precaution. This problem can be resolved by using the built-in tool of the Battle.net client to repair the game’s files hence to scan and fix your game files, follow the steps outlined below:

  1. 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
    Scan and Repair
  2. In the Scan and Repair Installation prompt window, click the “Begin Scan” button and wait while the software detects and repairs any corrupted or missing files in your game.
  3. After the repair process is complete, start the game and check if the issue is still occurring.

Solution 3: Launch The Game As Administrator

  1. 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
    Accessing COD:MW Properties Option
  2. 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
    Run Program As An Administrator
  3. Perform the same procedure with the “Modern Warfare Launcher.exe” file located in the same folder.
  4. 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
    Accessing Battle.net Properties Option
  5. 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
    Run Program As An Administrator
  6. Perform the same procedure with the “Battle.net Launcher.exe” file located in the same folder.
  7. 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
    Accessing Data Folder
  8. Restart your computer, launch the game as administrator and check if the issue is resolved.

Solution 4: Clear Windows Cache

  1. Press the “Windows + R” keys simultaneously, in the Run dialogue box, type the following command and press the “Enter” button:
temp
Typing In Temp
Typing In Temp
  1. Windows temporary files folder will appear in front of you, select all the files located in that folder and “Delete” them.
  2. Restart your PC afterwards and check if the issue is resolved.

Solution 5: Verify Integrity of The Game Cache

The steam client can also be used to check the legitimacy of the game file as viruses can damage game files and antivirus software can mistakenly remove them, therefore to verify the integrity of game files by following the guidelines provided below:

  1. Access the Games “Library” section of the “Steam” application, right-click on the “Call of Duty: MW” game, and choose the “Properties” option.
  2. 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 Dev Error 5476 Modern Warfare issue has been fixed.
    Verify integrity of game Cache
    Verify integrity of Game Cache

Solution 6: Derandomize your Calling card

  1. 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
    Accessing The Barracks Tab In COD:MW
  2. Click on the “Calling Cards” option, choose one of them, and select the option other than “Randomize All”.
    Selecting Calling Cards In COD:MW
    Selecting Calling Cards In COD:MW
  3. Now click on the “Emblems” option, choose one of them, and select the option other than “Randomize All”.
    Selecting Emblems In COD:MW
    Selecting Emblems In COD:MW

Solution 7: Clear Appdata Folders          

Some users reported that deleting the Modern Warfare / Warzone Appdata folder contents from the Windows drive fixed their issue, therefore, follow the instructions given below to delete Modern Warfare/ Warzone folder:

  1. Press the “Windows + R” keys simultaneously, in the Run dialogue box, type the following command and press the “Enter” button:
%appdata%
Typing in %appdata%
Typing in %appdata%
  1. Locate the “Modern Warfare/ Warzone” folder, right-click on it, select the “Delete” option afterwards, restart your computer and check if the problem has been addressed.

Solution 8: Reinstall The Game

If none of the preceding methods works, consider reinstalling the game hence to do so, follow the instructions given below.

  1. 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 From Battle.net
    Uninstalling Call Of Duty Modern Warfare
  2. After the game has been completely uninstalled from your PC, wipe all leftover data from the game’s installation folder, and then install the game from the Battle.net main menu.

Solutions For Xbox Users:

Solution 1: Set Static IP On Router

Xbox One Users:

  1. Navigate to your console’s “Settings” option and then proceed to the “Network Settings” option from the menu.
    Accessing Network Settings On Xbox One
    Accessing Network Settings On Xbox One
  2. 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
    Accessing Advanced Settings On Xbox One
  3. To access the router settings, open your browser and type the following IP address into the address bar, then log in with your username and password.
192.168.1.1
Typing In Browser's Address Bar
Typing In Browser’s Address Bar
  1. 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 to fix dev error 5476
    Accessing Router Settings Option
  2. Now launch the game in multiplayer mode and check if the issue is resolved.

Solution 2: Enable Port Forwarding

  1. Open your browser, type the following address in the address bar, and then log in using your sign-in credentials.
192.168.1.1
Typing In Browser's Address Bar
Typing In Browser’s Address Bar
  1. 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
    Accessing Port Forwarding Option
  2. Enter the created static IP for the console, select the “Enable” button, and then restart your console and Wi-Fi router for the changes to take effect.

Solution 3: Reset Your Console

Xbox One Users:

  1. While your console is still powered on, press and hold the “Power” button until the power light turns OFF.
    Pressing Power Button On Xbox One
    Pressing Power Button
  2. Unplug the cords from the power outlet, wait 5-10 minutes for the capacitors to discharge all power, then power “ON” your console, launch the game and check if the issue is gone.

Xbox Series X/S Users:

  1. 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 Xbox Series X/S
    Accessing Profile And System
  2. 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
    Accessing Device And Connections Option
  3. Verify if the Dev Error 5476 Modern Warfare has now been fixed.

Solution 4: Reinstall The game

  1. 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 Section On Xbox
    Accessing My Games And Apps
  2. 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 On Xbox to fix Dev Error 5476 Modern Warfare
    Selecting Uninstall All Option
  3. When the game is completely uninstalled, restart your console, afterwards, launch the “Microsoft Store” from the home screen, type “Modern Warfare” in the search box and select it from the list.
  4. Finally, choose the “Install” option and then follow the on-screen instructions to install the game on your console.
  5. Check if this fixes the Dev Error 5476 Modern Warfare issue.

Solutions For PlayStation Users:

Solution 1: Set Static IP On Router

PS4 Users:

  1. 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 Status Option On PS4
    Accessing View Connection
  2. IP and MAC addresses will appear in the connection status window, note them down to use them for setting up static IP on your router.
  3. Now, open your browser, in the address bar enter the following IP address to access the router settings window, and then log in using your username and password.
192.168.1.1
Typing In Browser's Address Bar to fix Dev Error 5476 Modern Warfare
Typing In Browser’s Address Bar
  1. 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
    Accessing Router Settings Option
  2. Finally, once you have successfully set up the static IP on your router, launch the game and verify if the multiplayer mode is now working.

Solution 2: Reset Your Console

  1. 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 to fix Dev Error 5476 Modern Warfare
    Turn OFF PlayStation
  2. Now switch your console back “ON” and launch the game afterwards.
  3. Verify if the Dev Error 5476 has been fixed on Modern Warfare.

Solution 3: Reinstall The game

  1. 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 On PlayStation
    Selecting Storage Option
  2. 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 On PlayStation
    Selecting Games And Apps Option
  3. 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 On PlayStation to fix Dev Error 5476 in Modern Warfare
    Accessing Your Collection Tab
  4. Wait for the game to download/install completely and then launch the game.
  5. Check to see if this has fixed the Dev Error 5476 in COD: Modern Warfare.

Contact Activision Support

If none of the above-mentioned fixes works for you, contact Activision Support for comprehensive troubleshooting.

If you are still unable to resolve the problem, please Contact Us for further assistance.

Fix PC Issues Automatically
If you want to have your PC related issues fixed automatically and diagnose, list, and rectify any registry errors, we recommend that you try using the Restoro Repair Tool that can easily do all of this at a single click. It has been rated Great by Trustpilot so you don’t have to worry about anything.
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