Repeaded loss of network

I am using Wifi Protection version 3.3.1045.  I have Century Link wifi.  I can go months in a row with no VPN problems.  Then I have days when I turn on the VPN and within 10 seconds it goes off with the notation "No network connection."  While I watch that screen it will change back to show that I am connected but when I turn on the VPN within 10 seconds it will turn off again with the notation "No Network Connection."  Going to settings and clicking "Add VPN configuration" does no lasting good.

Meanwhile I remain connected to the internet through my browser continuously.