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How to fix Dev error 11557? 

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  • 4 min read

Call of Duty is one of the most popular FPS franchises to ever exist with millions of players from around the world. However, as good as these games are, they’re often riddled with bugs and glitches that can totally ruin the playing experience. 

In this article, we’re talking about Dev error 11557 in Warzon 2 and MW2, its causes and what you can do to fix the problem.

What causes Dev error 11557?

The error is often caused by a corrupted game file. Other common causes include:

  • Improper or incomplete installation. 
  • Internet connectivity issues. 
  • Corrupted streamer cache.

Also read: Error connecting to Activision account? Quick Fix

How to fix this?

Here are x fixes you can try out.

Restart your router

Restarting your router can help eliminate any unseen network or connectivity issues you may face. You have to turn off your router, wait a bit, and then turn it back on again. 

Restart your game

One of the easiest ways to fix the problem is to restart the game. Restarting games and programs often resolves temporary bugs that can cause crashes or connectivity issues. Once the game is stopped completely (you can verify this using the Task Manager), relaunch it using the Steam launcher, and it should work just fine. 

Limit Shader texture cache sizes

Another reason why you might be experiencing this error can be a corrupt shader texture cache. You can fix this by reducing the cache size to the minimum. 

Step 1: Head over to the game settings and select Graphics.

Step 2: Head over to the Quality tab and scroll down to find On Demand Texture Streaming. Under more options, adjust the slider to reduce the available cache size.

Restart the game and the error should go away. 

Also read: How to fix error 60029: PermissionDenied? 

Verify Game Files

Corrupted game files can often lead to issues like this, not just in Call of Duty but other games. Luckily, Steam has a built-in feature that verifies your game files and reinstalls any files that might be damaged. Follow these steps.

Step 1: Head over to your Steam Library, right-click on the problematic Call of Duty game and select Properties.

How to fix the 'VAC was unable to verify your game session' error?

Step 2: Head over to the Local Files tab.

How to fix the 'VAC was unable to verify your game session' error?

Step 3: Click on Verify integrity of local files… and let Steam do its thing. 

How to fix the 'VAC was unable to verify your game session' error?

Now try relaunching the game. 


If checking the game files didn’t work out, your best bet is to delete the game from Steam and reinstall it from scratch. Ensure to overwrite your game save with the new installation, as corrupt saved files can also cause this issue. 

Also read: Why are my apps closing automatically on Android?

Yadullah Abidi

Yadullah Abidi

Yadullah is a Computer Science graduate who writes/edits/shoots/codes all things cybersecurity, gaming, and tech hardware. When he's not, he streams himself racing virtual cars. He's been writing and reporting on tech and cybersecurity with websites like Candid.Technology and MakeUseOf since 2018. You can contact him here: