What “home panel ‘header’” are you trying to update? Is it where it typically says “Home Assistant”? If so, that’s just text, not any sort of “device”/“entry”.
Based upon your configuration.yaml entry, your formatting is wrong, but that could just be inputting it wrong on Discourse.
“condition” is typically only ever for automations.
Do you have an example of the end game? What is it that you’re trying to accomplish?
You should never put your API Key out to the public, I hope that is a fake/dud key.
thanks a lot! what i dont understand is what needs to happen, so my weather, in the header, is not just a pic of the sun, and gives more details overall!