Hello,
With the v0.22 release of our prefered audio server, the mpd server could not work anymore
To solve this issue the temporary trick is to comment just after # for io_uring
only this single line: #LimitMEMLOCK=64M
in the systemd file /usr/lib/systemd/system/mpd.service
After having saved the modified /usr/lib/systemd/system/mpd.service file then sudo systemctl daemon-reload && sudo systemctl restart mpd.service
This is NOT NEEDED on my other arm platforms like archlinuxarm Odroid C1/C2, they have much more RAM than the 128MB Dockstar / GoflexNet.