"The network isn't connected to the internet"

A year ago my Simplisafe base station had trouble finding or discovering my WIFI N network connection, yet all other devices on my home WIFI connect flawlessly.  Finally a successful connection to my WIFI N access point, my Simplisafe base station kept losing the WIFI N connection then I receive a text reporting WIFI connection is lost, yet again every other device connected to same access point has a strong and stable connection.

Over time I kept reconnecting my Simplisafe base station to my wifi router and now it persistently is unsuccessful  and reports "the network isn't connected to the internet" although a dozen or more of my devices are connected to the same WIFI access point and never lose coverage.  In fact the WIFI router is located in the center of my home on the ceiling providing coverage to device located 10ft to 20ft direct line of sight away.  

I took a WIFI signal, looked at the group of channel with least interference, switch my access point to the channel (from 6 to channel 1) and the problem persist.

The base station should connect to my access point although it reporting "isn't connected to the internet".