Flashing white light, code 016

I recently upgraded my network to a NetGear Orbi, Mesh network. My Roku Ultra 4660X initially worked, then it stopped working and said I needed to set up a network connection. I powered off my TV, the Roku box, the entire network, and to still doesn't work. Ive done a reset of the Roku box, a FACTORY RESET of the same Roku Box, went thru all the set up steps, and it worked.......for a while. Now it's doing the exact same thing with a message that says, No Network Connection, wit light on unit flashing fast twice, and at two second intervals. I wish I had some pics to post. I did not have any problems with my old, Netgear, NightHawk system.