Thanks for the journal log, it includes
dbus-daemon[1231]: apparmor="DENIED" operation="dbus_method_call" bus="session" path="/org/gtk/Notifications" interface="org.gtk.Notifications" member="AddNotification" mask="send" name="org.gtk.Notifications" pid=1788 label="snap.snap-store.ubuntu-software" peer_pid=1525 peer_label="unconfined"
which could be the issue there
Thanks for the journal log, it includes
dbus-daemon[1231]: apparmor="DENIED" operation= "dbus_method_ call" bus="session" path="/ org/gtk/ Notifications" interface= "org.gtk. Notifications" member= "AddNotificatio n" mask="send" name="org. gtk.Notificatio ns" pid=1788 label=" snap.snap- store.ubuntu- software" peer_pid=1525 peer_label= "unconfined"
which could be the issue there