Hello,
My music collection is stored on a Nextcloud server, at home. I have enabled the "
music" app (version 0.11.0) to allow streaming the audio files from my collection to external applications compatible with Subsonic (and Ampache).
On my Arch Linux laptop I use "Clementine" which has built-in capabilities to stream from a Subsonic server. This works perfectly.
On my work laptop (Windows 10) I have installed MusicBee and, following
the instructions kindly provided by MiDWaN on GitHub, I tried to configure the plugin as shown below:

The music app shows this address to use when browsing the music collection from a Subsonic compatible player:
https://<my.home.server>:<port#>/index.php/apps/music/subsonic
This combination of "hostname" and "port number" is the only one which make possible the main MusicBee window to show "Detected a Subsonic server" and ""Done running GetFolderFiles" messages in the lower left corner (see images below).


The issue is that no audio file from my collection is shown (as you can see in the two images above).
Other details which may help in troubleshooting the issue:
Subsonic Client v2.28.00
MusicBee version: 3.3.7261
Nextcloud version: 16.0.5 running on Ubuntu 18.04.3 LTS
I have a static IP from my ISP