: In most cases, this is just a visual warning and the game will still launch. However, if the game fails to load or crashes to the menu ("Race Cancelled"), you may need to update your Custom Shaders Patch to the latest recommended version. Root Cause
An outdated launcher cannot download the required shader files automatically. Open Content Manager. Go to > Content Manager > General . assetto corsa is obsolete v1163 is required link
If a faulty CSP profile is feeding corrupted telemetry data to the launcher, a manual reset will clear the error. Open . Click on Settings in the top-right menu panel. Select Custom Shaders Patch from the left column options. Navigate to the About & Updates section at the top left. : In most cases, this is just a
Resolution of "Obsolete" Version Errors and the Necessity of Update v1.16.3 Open Content Manager
Go to the tab and click Verify integrity of game files .
Sometimes Content Manager reports the wrong version due to a missing steam_api.dll or a modified acs.exe .
: Launching mods via Content Manager before ever opening the vanilla game launcher leaves registry strings blank. Step-by-Step Fixes