Since installing the update in May, I haven’t been able to use my Sonos speakers for the only use that matters to me: play the music recorded on an external SSD inserted in the Satechi Stand & Hub For Mac Mini (https://tinyl.io/BOh8) connected to my Mac Mini through USB. 

I followed the instructions from https://trello.com/c/wcfwIU8A/2-local-music-library But… 

Any help would be very much appreciated.