Mac Audio Out not working

Hi
I just bought and downloaded latest version 7.0.11.0.

I’m trying to setup Audio Playlists. But I cannot get any audio output. Input is working.

I have followed Mac Instructions with Soundflower and it is installed correctly.
https://help.manycam.com/knowledge-base/system-sound-not-available-macos/

However when I set up the new Multi-Output-Device in the MIDI controller it seems to allow no Volume.
When I try to press increase volume on my keyboard I get No Volume display - stuck on mute.

Anyone? thanks for the help.