When I try to run it from the command line, I receive an error:
** (nm-applet:2403): WARNING **: Could not initialize NMClient /org/freedesktop/NetworkManager: The name org.freedesktop.NetworkManager was not provided by any .service files
(nm-applet:2403): nm-applet-WARNING **: Error connecting to ModemManager: Error calling StartServiceByName for org.freedesktop.ModemManager1: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ExecFailed: Cannot launch daemon, file not found or permissions invalid
(nm-applet:2403): nm-applet-WARNING **: Could not find ShellVersion property on org.gnome.Shell after 5 tries
(nm-applet:2403): nm-applet-WARNING **: Failed to register as an agent: (2) The name org.freedesktop.NetworkManager was not provided by any .service files