Ubiquity 2.18.7
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"

(ubiquity:2265): Gtk-CRITICAL **: gtk_radio_button_set_group: assertion '!g_slist_find (group, radio_button)' failed

(ubiquity:2265): Gtk-CRITICAL **: gtk_radio_button_set_group: assertion '!g_slist_find (group, radio_button)' failed
update_release_notes_label()
update_release_notes_label()

(process:4140): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "gail"
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `GtkRange::activate-slider' of type `gboolean' from rc file value "((GString*) 0xafec3c20)" of type `GString'
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `GtkRange::activate-slider' of type `gboolean' from rc file value "((GString*) 0xacd88f10)" of type `GString'
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "gail"
Gtk-Message: Failed to load module "overlay-scrollbar"
No such schema 'com.canonical.indicator.session'
No such schema 'com.canonical.indicator.session'
No such schema 'com.canonical.indicator.session'
/usr/lib/ubiquity/plugins/ubi-console-setup.py:138: Warning: Source ID 795 was not found when attempting to remove it
  GLib.source_remove(self.keyboard_variant_timeout_id)
/usr/lib/ubiquity/plugins/ubi-console-setup.py:72: Warning: Source ID 785 was not found when attempting to remove it
  GLib.source_remove(self.keyboard_layout_timeout_id)
/usr/lib/ubiquity/plugins/ubi-console-setup.py:74: Warning: Source ID 1383 was not found when attempting to remove it
  GLib.source_remove(self.keyboard_variant_timeout_id)