SIOCSIFMTU: Operation not permitted openconnect stopped working

[jowfdoijdfdwfwdf]

openconnect to Cisco ASA (Anyconnect) stopped working, error in syslog failure to set tunnel interface MTU. This appears to be a regression.

Jan 29 13:07:51 hostname openconnect[5119]: CSTP connected. DPD 30, Keepalive 20
Jan 29 13:07:51 hostname openconnect[5119]: SIOCSIFMTU: Operation not permitted
Jan 29 13:07:51 hostname nm-openconnect-[5124]: nm-nopenconnect-service-openconnect-helper did not receive a valid VPN Gateway from openconnect
Jan 29 13:07:51 hostname nm-openconnect-[5102]: Terminated openconnect daemon with PID 5119.

Ubuntu 16.10

ii network-manager 1.2.4-0ubuntu1 amd64 network management framework (daemon and userspace tools)
ii network-manager-gnome 1.2.4-0ubuntu2 amd64 network management framework (GNOME frontend)
ii network-manager-openconnect 1.2.2-1 amd64 network management framework (OpenConnect plugin core)
ii network-manager-openconnect-gnome 1.2.2-1 amd64 network management framework (OpenConnect plugin GNOME GUI)
ii network-manager-openvpn 1.2.6-2ubuntu1 amd64 network management framework (OpenVPN plugin core)
ii network-manager-openvpn-gnome 1.2.6-2ubuntu1 amd64 network management framework (OpenVPN plugin GNOME GUI)
ii network-manager-pptp 1.2.2-1 amd64 network management framework (PPTP plugin core)
ii network-manager-pptp-gnome 1.2.2-1 amd64 network management framework (PPTP plugin GNOME GUI)

[Mike Miller (mtmiller)]

If you have apparmor installed and enabled, this could be a bug in the apparmor settings or a conflict between the active profile and openconnect. If you disable apparmor does this error disappear?

[Launchpad Janitor (janitor)]

[Expired for network-manager-openconnect (Ubuntu) because there has been no activity for 60 days.]