Before diving into the solutions, it helps to understand what triggers this issue:

Check the koko.cfg or config.txt files inside Kitserver to ensure the game paths point correctly to your setup. Free Alternatives to Restore Missing .AFS Files

If the files are physically present in your folder but the game still claims they are missing, your Windows Registry is likely pointing to the wrong directory. This happens frequently with pre-installed or portable versions of the game. Open Notepad on your computer. Copy and paste the following text into the blank document: