I'm having an issue with the tp-link app on an Android phone when setting up a couple of EP10 smart plugs. These plugs come in a box of 4 and I was able to setup the first two without any problems. However the second two are having an issue (the same issue for both). During the setup I am able to connect to the smart plug WIFI then switch the phone back to my home network. When I check my router, the MAC address of the new plug shows up as being connected to the router and light on the plug turns blue. But for some reason the app is unable to see it. Instead I get an 'Unable to Connect to Your Wi-Fi Network Error". 

According to the instructions for this error, if the LED on the plug is solid blue, which mine is, I need to make sure the device and the phone are on the same network, which they are. Then refresh the devices page on the Kasa App. Unfortunately, no where does it say how to refresh the devices page. I have looked in all through the app and have not found a 'refresh devices' setting. I have tried shutting down the app and restarting, but this does not fix the problem. These plugs are useless unles they are set up through the app, so I'm not really satisified with these plugs at the moment.

Kasa App version 3.3.550 Build 1226 (update says this is up to date).