Sorry, but there are some issues with music software that I do not use per se. Decided to check out whether they can be installed or uninstalled properly in SnakeOil tab; have not run them after install. For me, it is not a priority to fix but you may have other users who use them.
Squeezelite Ralph uninstalling
Setting up usbmuxd (1.1.1~git20191130.9af2b12-1) ...
Warning: The home dir /var/lib/usbmux you specified can't be accessed: No such file or directory
Adding system user `usbmux' (UID 118) ...
Adding new user `usbmux' (UID 118) with group `plugdev' ...
Not creating home directory `/var/lib/usbmux'.
usbmuxd.service is a disabled or a static unit, not starting it.
HQPlayer NAA installing
*** Name: HQPlayer Mode: Installing ***
Downloading: .deb
File size is empty
*** Name: NAA Mode: Installing ***
--2021-05-01 05:34:47-- https://www.signalyst.eu/bins/naa/linux/xenial/networkaudiod_3.5.5-39_arm64.deb
Resolving www.signalyst.eu (www.signalyst.eu)... 91.150.61.206
Connecting to www.signalyst.eu (www.signalyst.eu)|91.150.61.206|:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2021-05-01 05:34:50 ERROR 404: Not Found.
RoonServer installing
*** Name: RoonServer Mode: Installing ***
Hit:1 http://au.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://ppa.launchpad.net/jean-francois-dockes/upnpp1/ubuntu focal InRelease
Hit:3 http://au.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:4 http://au.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:5 http://au.archive.ubuntu.com/ubuntu focal-security InRelease
Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
Package libav-tools is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
ffmpeg
......
E: Package 'libav-tools' has no installation candidate
/usr/local/bin/curl
[1mChecking to see if RoonServer can run on this machine [39;49;00m
Checking for Binary Compatibility [ [32;01mOK[39;49;00m ]
Checking for ALSA Libraries [ [32;01mOK[39;49;00m ]
Checking for ffmpeg or avconv [ [31;01mFAILED[39;49;00m ]
Checking for the mount.cifs command [ [32;01mOK[39;49;00m ]
Testing ulimit -n 8192 [ [32;01mOK[39;49;00m ]
STATUS: [31;01mFAILED[39;49;00m
These issues must be addressed before RoonServer will run on this machine.
Clementine installing
...
Setting up usbmuxd (1.1.1~git20191130.9af2b12-1) ...
Warning: The home dir /var/lib/usbmux you specified can't be accessed: No such file or directory
Adding system user `usbmux' (UID 118) ...
Adding new user `usbmux' (UID 118) with group `plugdev' ...
Not creating home directory `/var/lib/usbmux'.
usbmuxd.service is a disabled or a static unit, not starting it.