BLUI Open Source HTML5/JS/CSS HUD/UI

Looking for figuring out why I am unable to get mouse clicks to register through vr triggers. Below is how I hooked it up for 4.272.
For whatever reason, trigger BLUI always returns as invalid, even though I cast to the vr pawn.
Is there something I may be missing, or is it just hooked up wrong?
Any help would be appreciated.