CAX80 Network Error

It might be useful to validate that the Nixplay frame is connected to the WiFi network.

Page 71 of the CAX80 User Manual describes how to check which devices are on the network:

https://www.downloads.netgear.com/files/GDC/CAX80/CAX80_UM_EN.pdf 

I like to "double check" by seeing if devices respond to queries on the network.  Once the CAX80 has revealed the IP address associated with the Nixplay, I open a command window and try to 'ping' the device from my desktop or laptop computer. (There are apps for Apple and Android devices that do the same thing.)  Not every device responds to network requests.  (Windows computers, for example, have a Firewall that must be instructed to respond to ICMP.)  Many consumer devices are set to respond, including many smart plugs, speakers (Nest Mini does, but Echo Dot does not).

That app error does not seem particularly helpful.  You are "thinking ahead" to consider how to troubleshoot the problem on the network before contacting Nixplay support.  They will almost certainly ask you to verify that it is connected.  They may also ask if you have tried resetting the device.  (Customers typically hate this idea if it involves finding and reloading the media that they put on it months and months ago.)