If fileSysCheck.cfg is missing, you may need to reinstall the game or source the file from a backup.

When the game attempts to launch, it performs a file system check to ensure that all necessary files are present and intact. If the game detects any issues with the filesyscheck.cfg file or other game files, it will display an error message, preventing the game from launching.

via your launcher (Steam or Battle.net), and then letting the launcher rebuild the necessary files. or a download for a missing

Call of Duty: Ghosts — filesyscheck.cfg Error Fixes & Guide

Update your graphics drivers via the NVIDIA GeForce Experience or AMD Software portal.

In this guide, we’ll walk you through exactly what causes the filesyscheck.cfg error and the three methods to solve it permanently.