How to Fix the ‘Join Failed Because You Are on a Different Version’ Error in Modern Warfare 2

This error happens when there is a mismatch between the version of Modern Warfare 2 that you have installed and the version that is being used in a game lobby. The game will be expecting you to have the same version of the game that the host is using, but if you don’t, then it won’t let you join. This is the error that you might be seeing when trying to join a match.

If you’re running into this error, then you’ll be happy to know that there are a few things you can do to try and fix it. The first step is to make sure that you’re running the latest version of Modern Warfare 2. This can be done by updating the game through Steam or the Epic Games launcher. Once you’ve done that, you can try restarting your system and restarting Modern Warfare 2. This should resolve the issue, but if it doesn’t, then you can try joining a different server or game lobby.