From the logs:
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: Exception in GTK frontend (invoking crash handler):
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: Traceback (most recent call last):
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: File "/usr/lib/ubiquity/ubiquity/frontend/gtk_components/nmwidgets.py", line 254, in connect_cb
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: self.nm_connection = client.add_and_activate_connection_finish(result)
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: gi.repository.GLib.GError: nm-manager-error-quark: Not authorized to control networking. (1)
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]:
From the logs: ubiquity/ ubiquity/ frontend/ gtk_components/ nmwidgets. py", line 254, in connect_cb add_and_ activate_ connection_ finish( result) GLib.GError: nm-manager- error-quark: Not authorized to control networking. (1)
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: Exception in GTK frontend (invoking crash handler):
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: Traceback (most recent call last):
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: File "/usr/lib/
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: self.nm_connection = client.
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: gi.repository.
Oct 17 01:46:34 ubuntu-mate ubiquity[2338]: