Initializing nautilus-gdu extension

** (nautilus:3292): WARNING **: Failed to get the current CK session: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '3292'

(nautilus:3292): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Nautilus-Share-Message: Called "net usershare info" but it failed: »net usershare« gab den Fehler 255 zurück: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error Datei oder Verzeichnis nicht gefunden
Please ask your system administrator to enable user sharing.