Hi Hans,
Appreciate the response — I rescaled the image from a 3840×2160 image to a 5200×5291 image to test and I still saw the grey boxes.
I changed the Stylesheet.css under the /* Hero (Welcome) section where the .hero { code begins from:
padding: 210px 0 170px;
to
padding: 0px 0 0px;
to test and I still see the grey box. Am I missing something?