GPO Viola not playing pizzicato, but everything else (and violins) working correctly

@Janus Yes, I think that’s what I imported. The thing I can’t figure out is, it shouldn’t matter. The patch called Violas KS was in the set included with Finale. For some reason, the pizzicato sound from violas simply won’t play. Even if I open a new document in Dorico and load Aria player I can not get it to make a sound in pizz – even a patch that is ONLY pizzicato with no keyswitches. But everything works perfectly for violins, cellos, basses… what is going on?