Woo Commerce featured product page (lightbox) has black background color

I am new to the forum and thank you for any help or input you may have.

I am building my first site using Woo commerce and High End theme. By default, all pages seem to have a clean, white page background. However, my Featured Product page that opens when I go to full page mode (after clicking image with magnify glass icon) has a black background. This is problematic for me as I sell photography and my featured images have a drop shadow effect on white background to mimic how my prints look as they are mounted/framed to have a “floating” effect.

I have tried options in the “customize” and “appearance” sections to no avail. Also contacted wp forums, they directed me to theme developer.

website is southcoastartworks.com

Thanks in advance.