Muon assumes that software-properties-kde is available and is using it to manage package sources (Settings -> Configure Software Sources).
Before the split of plasma-discover, s-p-k was installed as dependency of libmuon.
i.e. the dependency chain was muon <-- libmuon <-- software-properties-kde.
Muon 5.6.0-0ubuntu1
Muon assumes that software- properties- kde is available and is using it to manage package sources (Settings -> Configure Software Sources).
Before the split of plasma-discover, s-p-k was installed as dependency of libmuon. properties- kde.
i.e. the dependency chain was muon <-- libmuon <-- software-
This bug has been reported upstream as https:/ /bugs.kde. org/show_ bug.cgi? id=366590