Are you using the version of Content Manager?
To help narrow down the problem if you are still stuck, let me know: Did you recently ? assetto corsa is obsolete v1163 is required fix hot
If you use Content Manager (CM) to launch Assetto Corsa, an outdated CM build can trigger false version mismatches. Launch . Click on Settings in the top-right corner. Select the Content Manager tab, then click General . Look for the Check for updates button. Update to the latest stable or untested build. Are you using the version of Content Manager
The error message typically occurs when the Content Manager (CM) launcher or the Custom Shaders Patch (CSP) fails to recognize a minor update to the base game . Despite the alarming "obsolete" wording, your game version is likely already higher (e.g., v1.16.4), and the issue can usually be bypassed with a simple text edit. Quick Fix: Modify changelog.txt Launch
Let Steam run in online mode occasionally so it can background-check your software version alignment.