Device list refresh failed

Device list refresh failed.

What’s the mistake?
What should I do?

Hi, there,
If your phone is Android, please try to uninstall the Netvue APP and then install it from below link:


I too, since yesterday, have a problem.
From the App (smartphone Android) I can view 2 cameras out of 4.
Uninstalling the App and re-installing it with apk downloadable from the link
but nothing has changed