Hey there,
did you find a solution to this problem? I got my Nolly Archetype yesterday and have exactly the same problem. When I close the standalone app, I can’t play any audio. In Spotify it just skips all the tracks until an album has ended and Youtube has either the same error as above or plays without any sound.
So far none of the tips did actually help. 
I’m using a Focusrite 18i20 Gen1 with Win10, if that helps.
EDIT:
What eventually helps is changing the format from 24bits to 16 bits here (Control Panel > Sound > Double click on the device > Advanced), I dont know, why this changes any time and it’s not really suitable for everyday work if you have to dive that deep into the system after playing guitar for some mins.