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So the problem is in the pirated version? Please write more details One step after the other. Buy the game, and THEN you get help.

You are doing all kinds of mistakes. But most of all: you are using an illegal (pirate) version of Skyrim.

Or maybe your Flemish stubbornness and quarrelsomeness? :D

NMM IS an older mod manager. It might be MAINTAINED by enthusiastic diehards, but that doesn't mean it is a state-of-the-art MM. And the user HAS installed Oldrim versions of FNIS Creatures and FNIS Spells. How come? He downloaded it manually. Like I always did with NMM. In those old days I always wanted to SEE and control what was installed. So we don't even need to talk about Sexlab to show how wrong you are with "you CAN NOT". And Vortex IS intelligent. You must not have worked very much with Vortex to say that. "Tool Intelligence" you will often hardly notice. I had several in my very first hours of using Vortex. And the most astonishing: Vortex has setup FNIS properly without me ever installing FNIS through Vortex (as I will never overwrite my FNIS development environment with a downloaded FNIS versIon). Now THAT IS what I call intelligent. Can NMM do that?

Cannot? You bet. I'm not aware if Vortex makes checks when you say "Download with manager" because I would never load incompatible mods. But noobs do. But especially older managers like NMM, and ESPECIALLY when you go to download from from sites like Loverslab (as he does) then there is no way even an intelligent mod manager like Vortex can check that. Inside a downloaded file there is NO INFORMATION WHATSOEVER which allows to distinguish between Skyrim and Skyrim SE. What Vortex sees is nothing but a zip file with files BELOW "Skyrim" or "Skyrim Special Edition". And inside that the file structure is completely identical.

You have Skyrim SE. But all the mods that you have downloaded, and that get flagged are for Skyrim, not for Skyrim SE. You need to be really careful about it.

You are confusing different things in different areas: - You cannot use Skyrim (Oldrim) mods for Skyrim SE - PCEA and FNIS PCEA2 are different things - Patches can be harmful if you don't have the corresponding mods

Any errors or warnings in the FNIS output. Post it