Since the issue comes from the engine itself, you just need to verify the engine version from Epic Games, and it should fix the issue correctly.
The solution is to verify the engine through Epic Games.
In my case, I got errors saying “Unknown function” in the same directory—something related to GridMaterial. But when I verified the engine, the package was used correctly.
Note:
Installing new versions and then uninstalling them on a computer that is buggy and old may cause errors in engine files.always make sure to verify your engine throught the Egames . 