Challenge not yet complete... here's what's wrong:
It doesn't appear that your street has been set to '123 Secret Street'.
I've created a new playgroud twice and double checked my work repeatedly for the company and personal setting; in both Lightning and Classic. I'm out of ideas.
I have a custom object but I'm using a layout generated page as opposed to a custom vforce page. I want to add a bold, red line of text across the top of the page and I'm simply trying to avoid having to write a vforce page just to do this. Any tips?