I was just playing around today trying to get more familiar with HA and set up an iframe to show my wireless router just for grins and giggles. So I put the following in my configuration file:
panel_iframe:
router:
title: Router
icon: mdi:router-wireless
url: http://10.0.0.1/
It shows up in the side panel just fine, the icon is good, but when I click on the link I get an error:
400 Bad Request
Cross Site Action detected!
I suppose it could be something to do with Chrome but I can reach my router just fine outside of HA. Any ideas?