Try these advanced steps:
Reinstall Custom Shaders Patch (CSP) if you use it — outdated CSP can also cause false obsolete errors. assetto corsa is obsolete v1.16.3 is required fix
This is the most likely fix for 90% of users. Try these advanced steps:
Now try loading the problematic car mod again. It should work. Reinstall Custom Shaders Patch (CSP) if you use
Even if you own the game, files can go missing. Do this first to ensure your acs.exe is the official v1.16.3.
Once done, launch the vanilla game (not Content Manager) once, just to confirm it works. Then close it.
