I enable it here:
and I see it active (quality is very noticeable) and turning inactive after a few seconds. Also it shows here:
I can see the 'Status: Active' being changed to 'Inactive' in realtime after a few seconds.
But when I quit SVP then it immediately starts working again and it says 'Status: Active' again. So it's gotta be something specific with SVP.
I tried every single possible option in PotPlayer renderer but when SVP is enabled it always does the same: SuperResolution gets disabled after a few seconds.