Trouble with qJack

I followed this thread religiously to try to output Gig Performer to OBS studio using Jack Router.
I get to this point without any problem:

But as soon as I try to play, I don’t hear anything and qJack turns itself off. Has anybody else had this problem or know a different way to get AISO audio into OBS? BTW - this happens even if I only open Gig Performer in Jack Router. I double checked that everything was set to 44.1. Any help is appreciated.