This error means that the game you’re attempting to launch can’t locate a file or directory that it is pointing to.
Verifying your game files ensures your game has all the necessary files to run properly and hopefully should get the game working as expected.
Depending on the size of the game this process may take a while. Once it’s done try to launch your game.
If verifying your game files doesn't resolve the issue you can try to manually remove your game files from your computer.
Note: The default installation directory is C:\Program Files\Epic Games\
Right-click on the game folder and click on Delete.
Restart the Epic Games Launcher.
Reinstall and try launching your game.
Some background applications such as Antiviruses have caused this error to occur. Follow the instructions here to disable your background apps.