: If CM is completely stuck, you can force it to "re-index" by renaming its data folder. Press Win + R , type %localappdata% , find the AC Tools Content Manager folder, and rename it to something like AC Tools Content Manager-old . Installed Custom Shaders Patch is obsolete - OverTake.gg

As he pushed the car to its limits, the error message in his mind faded. He realized the truth. The game hadn't been asking for a software patch. It had been asking for him.

The error typically stems from a version mismatch between and the Assetto Corsa (AC) base game.

The game or a mod is telling you that your current version of Assetto Corsa is “obsolete” (outdated) and that you specifically need version 1.16.3 installed to proceed.

Here are the two methods to solve this, ranked from easiest to most technical.

However, it's essential to note that these solutions may not be officially supported by the game's developer, and players may need to take risks to fix the issue. Ultimately, it's up to Kunos Simulazioni to release an official fix to address the problems and bring the community back together.