: If playing via PC Game Pass, ensure you haven't exceeded the Microsoft Store device limit in your account settings. PlayStation & Xbox Solutions
typically occurs when the game's launcher (COD HQ) fails to recognize installed packs or encounters corrupted data : If playing via PC Game Pass, ensure
: Some users report fixing the error by moving the "english" folder from the main directory into the "Zone" folder within the game’s installation directory. Users and Accounts Restore Licenses Install All Add-Ons
: This is the most effective fix for most PlayStation users. Users and Accounts Restore Licenses Install All Add-Ons : Manually verify that every MW3 module is installed. Highlight the game on your home screen, press the button, and select Manage Game Content Alternatively, go to your Modern Warfare III PlayStation Store and download all related add-ons manually. Check Region Match press the button
For a visual walkthrough on fixing menu loops and missing content errors, watch this guide: