One of the advantages of MW3 is its support for crossplay, but you may encounter anerrorstating you do not have permission to play with users on other platforms. I will explain how to fix it below.
How to fix the MW3 crossplay permission error
If you’re anything like me, trying to queue up with some friends based on another platform or just trying to play solo, and all of a sudden, you’re hit with an error stopping you from doing so. The way to fix this is quite simple:all you have to do is toggle crossplay off, then back on and restart your game.
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For more on MW3, be sure to check outAll MW3 Season 2 Prestige EmblemsandIs MW3 new player friendly?here on Pro Game Guides.