@Kmz, if you are using the MPD update I provided (most likely), then you can revert it to the original:
$ cd /opt/mpd-0.21.16_20191227/bin
$ sudo ./systemd-switch-mpd.sh --original
Follow with a reboot.
Having said that, the MPD update does not overwrite any of the original system files that came with Volumio, such as ALSA, pulseaudio and the SOX resampler. This custom MPD 0.21.16 is self-contained and the libraries it uses are isolated from the rest of the system. If the Spotify plugin relies on libasound_module_conf_pulse.so (which is reported as missing / broken in the logs), then it is relying on the version that is provided by Volumio instead of the one bundled with the custom MPD.
If you upgraded Volumio to 2.882 from a previous version, perhaps the upgrade broke some system files. For example, I found this in the forums:
That post is pretty old, but it’s still a Jessie-based installation and the error looks very much like the one you got when you do aplay -l. Perhaps you can try sudo apt-get install libasound2-plugins as mentioned in that thread?
@ashthespy , I know the Spotify plugin uses spopd for relaying commands and status updates, but under the hood does it use MPD for playback?