flatpakcommand at the end of this step.
In order to install ownCloud Music with GNOME Software, launch GNOME Software, which is called just Software, search for ownCloud Music and finally click the Install button.
Alternatively, launch a Linux terminal emulator and type the command below and press the Enter key to install the package.
flatpak install nuvola eu.tiliado.NuvolaAppOwncloudMusic
Alternatively, you can launch ownCloud Music from a terminal:
flatpak run eu.tiliado.NuvolaAppOwncloudMusic