It has to do with authorization issues on your PC, and even the usual running as admin does not help. Usually (not always) these users - use NMM, and - have Steam, NMM, Skyrim all installed under 'C: Program Files(x86)'. Is denied: Recently there is a rising number of users who get this error trying to run FNIS. Nope im blind, the solution is on the fnis nexus page: ERROR(5): Access to the path. Generate fnis for users is literally the only place in which you can view that error #5. This guide assumes you are using an account with administrator privileges. This guide requires that you have some common knowledge of modding Skyrim. Here is the instructions for installing FNIS manually for Skyrim, for those of you who are wanting to install FNIS for SexLab please look here.

If you notice the path it is looking in is not your Skyrim directory but you. Of 'FNIS Sexy Move' and 'FNIS PCEA2' stopped with ERROR(s): Last FNIS. But if I could generate FNIS resources somewhere.