I have two camera setup and for over 24 hours they have stopped work. I have rebooted my router, I modem, done several resets on both cameras. I also uninstalled and reinstalled the app, change passwords, check settings on my router. And they refuse to connect. 

And the app (kasa or tapo) I'll go through the process of adding the camera's back. Once I connect to the camera during the setup will just stay there for a while and eventually tell me you can't connect to the kasa spot. Once in a while and I can get it to go to the point where it wants the Wi-Fi info, and I tell it to connect to this network and type the password it'll just tell me fail to connect try again later. At this point I don't know what's going on with them. If there was some type of major service outage I figured everybody be talking about it so I'm not sure what's going on with my cameras.