I am experiencing the same issues Stonster and grire974 seem to be having.
On RPI4 (LibreElec 10.0.2), Snapserver does not work.
Sometimes "Pulse Audio: Null, Null" does appear, at first install of the addon there was "Pulse Audio: Snapserver" but it's gone now, so I tried "Puls Audio: Bluetooth" (that works on another LibreElec I am running on a laptop).
Whenever Snapserver is installed, audio and video don't work properly (after rebooting), songs don't play right, they stop at 0:00 or 0:02. This happens even when I switch system->audio output to my USB DAC back again. After uninstalling Snapserver, everything works fine, again.
Has anyone got this working on RPI4?
awiouy Do you have any idea what might be the problem?