nm-applet always disappear with ubuntu mate 16.04 Raspberry pi 3

[rusli]

apport bug collect for nm-applet awalys disappear with ubuntu mate 16.04 on Raspberry pi 3.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager-gnome 1.1.93-1ubuntu1
Uname: Linux 4.1.19-v7+ armv7l
ApportVersion: 2.20.1-0ubuntu2
Architecture: armhf
Date: Thu Apr 28 16:28:08 2016
IpRoute:
 default via 192.168.1.1 dev wlan0 proto static metric 600
 169.254.0.0/16 dev wlan0 scope link metric 1000
 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.160 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
PciNetwork:

ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager-applet
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 wlan0 wifi connected /org/freedesktop/NetworkManager/Devices/1 ASUS121 1 ed4347ce-7389-4176-a00b-0cc480e794d7 /org/freedesktop/NetworkManager/ActiveConnection/0
 enxb827ebfac8a2 ethernet unavailable /org/freedesktop/NetworkManager/Devices/0 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/2 -- -- --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.