Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1255, in on_next_clicked
    if ui.plugin_on_next_clicked():
  File "/usr/lib/ubiquity/plugins/ubi-wireless.py", line 111, in plugin_on_next_clicked
    self.nmwidget.connect_to_ap()
  File "/usr/lib/ubiquity/ubiquity/nm.py", line 396, in connect_to_ap
    self.view.connect_to_selection(passphrase)
  File "/usr/lib/ubiquity/ubiquity/nm.py", line 342, in connect_to_selection
    self.wifi_model.connect_to_ap(model[parent][0], ssid, passphrase)
  File "/usr/lib/ubiquity/ubiquity/nm.py", line 121, in connect_to_ap
    obj, dbus.ObjectPath(device), dbus.ObjectPath(saved_path))[1]
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 143, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 630, in call_blocking
    message, timeout)
DBusException: org.freedesktop.DBus.GLib.UnmappedError.NmSettingWirelessSecurityErrorQuark.Code1: Failed to determine AP security information