So, out of the blue, the app and Iphone quit communicating with HA. I’ve tried using a browser to reach HA and this also does not work?!? I’m confident that all of my testing is done at home on the same wireless network as the pi running HA.
No- I have never made a certificate, but it seemed to always work.
This AM, the app “detected an instance of HA” and asked if I wanted to connect- which worked. I noticed that it resolved the IP address and populated that field in the app. Seems to work again.