If you are using Content Manager (highly recommended), it might be attempting to load a version of CSP that is too new or too old for your game version. Open . Go to Settings > Custom Shaders Patch .
The primary cause is a text mismatch where the Custom Shaders Patch fails to properly read Assetto Corsa's internal version number, misinterpreting minor updates (like v1.16.4) as an obsolete build. Quick Comparison of Fix Methods Target Cause Complexity Permanent? Version number text mismatch Verify Steam Files Corrupted or missing official files Update/Reset CSP Outdated or bugged shader patch CM Test Access Locale/Regional parsing issues Method 1: The Changelog Text Trick (Fastest Fix) assetto corsa is obsolete v1163 is required fix
If it says 1.16 or 1.16.4 , manually change it to exactly 1.16.3 . the file and restart Content Manager. Alternative Fixes If you are using Content Manager (highly recommended),
Go to your Assetto Corsa root folder ( ...\steamapps\common\assettocorsa ). Right-click AssettoCorsa.exe and select . Go to the Compatibility tab. The primary cause is a text mismatch where
By following these steps, you should be able to resolve the error and get back to racing.
By sharing knowledge and resources, players can work together to find a solution to the game's online issues and continue to enjoy Assetto Corsa.
The frustrating error usually occurs when launching the game via Content Manager (CM) after installing or updating the Custom Shaders Patch (CSP) . This error blocks mod setups and race starts, even if your game is fully updated on Steam.