recent SVP versions set required permissions automatically once you select "SVP in VLC"
what SVP version are you using?
do you see UAC prompt?> i have no idea on how to do it because you don't provide any info on how to do so
there're a lot of images on that wiki page...
and it clearly mention that you can simple run SVP menu -> Utilities -> "Set env. variable from VLC and mpv"
The version i have is 4.1.0.111 and i'm not sure what the UAC promt is but i don't think i see it