Hm, interesting, thank you! I’ll definitely do that next time! As for this error, I think I would rather try to determine where this request is coming from than just get a new IP address…
If you follow the discussion it leads to this advice that may help narrow it down:
You have something trying to connect with the wrong protocol
Using https when the server expects http, or using http when the server expects https will give this.
There may be other results with further help. Use the search.
Since you d rather not change your ip, try thinking of what programs you have connected to home assistant in the past that you’ve forgotten about… try turning all your computers off except what is running home assistant and turn them on one by one while checking for errors.
In my case, I believe I had an old influxdb database that I had forgotten about trying to access my home assistant.