Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/frontend/gtk_components/nmwidgets.py", line 275, in __init__
    self.state_changed)
  File "/usr/lib/ubiquity/ubiquity/frontend/gtk_components/nmwidgets.py", line 98, in __init__
    self.configure_icons()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtk_components/nmwidgets.py", line 175, in configure_icons
    default = default.load_icon(Gtk.STOCK_MISSING_IMAGE, 22, 0)
GLib.GError: gtk-icon-theme-error-quark: Icon 'gtk-missing-image' not present in theme Adwaita (0)