Everything was fine until I updated Call of Duty Modern Warfare Remastered. After the update I got that error in the image. Here’s how to fix it. In your Steam library, right click on the game in question, in this case it’s Call of Duty Modern Warfare Remastered. Once you locate the game, left click “Properties”, left click “Local Files”, left click Verify Integrity Of Game Cashe. That should do the trick. This procedure is the same for all games that produce these kind of errors. In most cases all you will need to do is Verify the integrity of the game in question. In this case it’s Call of Duty Modern Warfare Remastered’s cashe. Let me know if this helped you in the comments.