Have you correctly unzipped the game from the folder it comes in when you downloaded it?
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Just for test, i redownloaded it and extracted staright into a folder. I also reinstalled again the UE prequisites.
Is there anything i might be missing?
How exactly is the install for the game goes? I try some reinstalling now, maybe something in my system gave up.
Edit:installing all the updates i could, still results in the same error.