(xfce4-session:2108): xfce4-session-WARNING **: 18:02:54.664: xfsm_manager_load_session: Something wrong with /home/xubuntu/.cache/sessions/xfce4-session-xubuntu:0, Does it exist? Permissions issue?
(xfwm4:2280): GLib-CRITICAL **: 18:02:56.392: g_str_has_prefix: assertion 'prefix != NULL' failed
(xfwm4:2280): xfwm4-WARNING **: 18:02:56.953: Unsupported GL renderer (llvmpipe (LLVM 9.0.1, 256 bits)).
(xfsettingsd:2301): GLib-CRITICAL **: 18:02:57.564: g_str_has_prefix: assertion 'prefix != NULL' failed
(xfsettingsd:2301): GLib-GObject-CRITICAL **: 18:02:57.565: g_value_get_string: assertion 'G_VALUE_HOLDS_STRING (value)' failed
(xfsettingsd:2301): GLib-GObject-CRITICAL **: 18:02:57.574: g_value_get_string: assertion 'G_VALUE_HOLDS_STRING (value)' failed
(wrapper-2.0:2337): GLib-GIO-CRITICAL **: 18:02:57.666: g_file_new_for_path: assertion 'path != NULL' failed
(wrapper-2.0:2337): GLib-GIO-CRITICAL **: 18:02:57.666: g_file_monitor_file: assertion 'G_IS_FILE (file)' failed
(wrapper-2.0:2337): GLib-GObject-WARNING **: 18:02:57.666: invalid (NULL) pointer instance
(wrapper-2.0:2337): GLib-GObject-CRITICAL **: 18:02:57.666: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(wrapper-2.0:2337): Gtk-WARNING **: 18:02:57.666: Attempting to add a widget with type GtkToggleButton to a container of type XfcePanelPlugin, but the widget is already inside a container of type XfcePanelPlugin, please remove the widget from its existing container first.
(wrapper-2.0:2337): Gtk-WARNING **: 18:02:57.703: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner GtkToggleButton)
(wrapper-2.0:2314): Gtk-WARNING **: 18:02:57.787: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner GtkToggleButton)
(wrapper-2.0:2343): Gtk-WARNING **: 18:02:57.800: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner PulseaudioButton)
(wrapper-2.0:2342): xfce4-power-manager-plugin-WARNING **: 18:02:57.883: Xfce4-power-manager: The panel plugin is present, so the tray icon gets disabled.
(wrapper-2.0:2342): Gtk-WARNING **: 18:02:57.935: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner PowerManagerButton)
(polkit-gnome-authentication-agent-1:2387): GLib-CRITICAL **: 18:02:58.243: g_variant_new_string: assertion 'string != NULL' failed
(polkit-gnome-authentication-agent-1:2387): polkit-gnome-1-WARNING **: 18:02:58.243: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
(nm-applet:2385): Gtk-WARNING **: 18:02:58.534: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:03:15.932: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:03:15.932: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:03:15.950: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:03:15.965: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:03:15.965: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:03:15.984: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:07.224: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:07.224: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:07.244: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:07.289: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:07.289: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:07.308: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:07.326: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:07.326: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:07.344: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-WARNING **: 18:04:07.910: Can't show Caps Lock warning, since secondary icon is set
(nm-applet:2385): Gtk-CRITICAL **: 18:04:10.107: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:10.107: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:10.124: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:10.140: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:10.140: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:10.154: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:11.847: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:11.847: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:11.867: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:11.880: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:11.880: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:11.895: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:13.197: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:13.197: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:13.213: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:13.226: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:13.226: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:13.242: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:14.590: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:14.590: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:14.610: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:14.667: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:14.667: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:14.686: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:14.739: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:14.739: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:14.758: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:17.832: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:17.832: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:17.849: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:04:17.883: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:04:17.883: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:04:17.901: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:08:26.576: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:08:26.576: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:08:26.593: Can't set a parent on widget which has a parent
(nm-applet:2385): Gtk-CRITICAL **: 18:08:26.608: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-CRITICAL **: 18:08:26.608: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
(nm-applet:2385): Gtk-WARNING **: 18:08:26.610: Can't set a parent on widget which has a parent