i have the pirate version and its happened to me too. i tried uninstalling the pcea 2 that it said its is wrong and tried aggain. nothing updated fnis for all along but nothing. lastly i disabled all the mods i installed for skyrim and closed the nexus mod manager,gone to the game folder and opened the original version of skyrim launcher instead of skse and nothing aggain. help! btw when i was simply updating the fnis for users it was giving me no errors at all but the pcea2.