root@naoyuki-Inspiron-11-3157:/usr/local/vpnbridge# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.30.1    0.0.0.0         UG    0      0        0 vpn_client
xx.xxxx.xxx.xxx 192.168.2.1     255.255.255.255 UGH   0      0        0 wlp1s0
link-local      *               255.255.0.0     U     1000   0        0 wlp1s0
192.168.2.0     *               255.255.255.0   U     600    0        0 wlp1s0
192.168.30.0    *               255.255.255.0   U     0      0        0 vpn_client

 

$ sudo apt-get install network-manager-openvpn

If that fails please also install below:

$ sudo apt-get install network-manager-openvpn-gnome

続いて再インストールが必要。

$ sudo apt-get install --reinstall network-manager network-manager-gnome network-manager-openvpn network-manager-openvpn-gnome