WhyEm \ 's Assortment on Pirate (Red Dead Redemption 2)

Hello everyone! There is a question regarding the WhyEm's Assortment mod on the pirated version of the game. Has anyone installed it? The author of the mod on the nexus indicates that the mod does not work with the pirated version of the game and he does not explain why, so it became interesting, maybe someone could still install it and understand what was going on. If you install the mod on a pirated version of the game, the FFFFF error pops up when loading the game and the game crashes.