The weird thing is that none of this happens when I use a wired ethernet connection on my router. This allowed me to re-add the library and play it, but whenever I switch over to Wi-Fi I'm getting errors again. I have the impression that all of this started happening after I had connected my Mac through ethernet for a Skype conversation (while I normally only use wireless). Could that have messed up the system somehow?
I'm using the Sonos Controller app on a Macbook Pro running macOS Sierra.
Best answer by rattyView original