Raspotify disconnects client when trying to play audio

[serman]

On raspberry pi zero 2.

I manually added this patch to the downloaded files:
#117

1. The device appears on the Spotify connect devices list. Select it
2. Play Song
3. Phone is disconnected from the device.

on /var/log/messages:

pulseaudio "Denied access to client with invalid authentication data"

Quick solution: https://unix.stackexchange.com/questions/338687/pulseaudio-as-system-wide-systemd-service

After some experimentation I found that modifying /etc/pulse/system.pa to permit anonymous:
load-module module-native-protocol-unix auth-anonymous=1

With this it works on my setup