This happened today, my TL-WPA4220 now only shows up on tpPLC as having Powerline only, no wifi.
This means i don't get the wifi icon or indication of wifi speed and can't open the web configuration from tpPLC.
Now the reason why this happened makes no sense to me, i pressed the led on/off on the tp plc utility, in order to turn off the leds in both devices. That's it.
I have tried instaling the most recent tpPLC utility, updating firmware on the device, it's working, wi-fi extender works, but it's not properly detected on the tpPLC utility.
This is how it shows up now:
As an example, this is what it should look like (i got this image from the internet, it's not from my device, i have an older, slower model)