Assetto Corsa Is Obsolete V1.16.3 Is Required Fix ((link))

Once you have fixed the issue, here is how to avoid seeing again:

– This is the most straightforward reason. Pirated copies are often based on old versions (v1.0, v1.5, v1.11). Mods with version checks will instantly reject them. assetto corsa is obsolete v1.16.3 is required fix

Are you using a or the official Steam version of the game? Installed Custom Shaders Patch is obsolete - OverTake.gg Once you have fixed the issue, here is