OpenWrt from HomeAssistant - iframe

Before I updated OpenWRT I could reach OpenWRT in my HomeAssistant site via iframe.
Now it pops up the loading luci configuration interface on top left and shows a blank page.

How can I allow embed to use OpenWrt in HomeAssistant again?

Have you cleared your browsers cache already?

yes, plenty times, even reinstalled the browser, once the windows too.
Does OpenWRT has a hidden configuration to allow iframe from external IP?

And chrome says the address denied the connection.

SO it is not a security setting issue on my site? :frowning: