In most cases using a No-CD or Fixed EXE will solve this problem!
When this happens use the original EXE to play online, else you could find yourself banned from the game!
Always make a backup of the files that are overwritten by the File Archive, as the original files are usually required to update the game to a newer version or to play Online!.: Various Webshops (No-STEAM) (Denuvo) (Digital Download)