I'm a little familiar with reading Duf-Files: I opened the 'Normals-on.Duf' and see, that this file refers entirely to Jade's folder. Since Rocco does not have the same 'Normal'-files like Jade, I also could not fix entirely it with replacing the folder and file names.

Most likely the 'Normal-On.duf' belongs to Jade and the Rocco version is missing, so the vendor has mixed up something. I guess, if you own also Jade, it seems to work, but I have no idea, how the render will look with female normal on a male.