Hello,

The dummy banner image for the black Friday comes with the demo import as the actual images are not included with the demo import due to copyright issues.

You need to have your own image for the header banner background.

OR

You can save the image used in our demo version at the following link:
https://woodmartcdn-cec2.kxcdn.com/wp-content/uploads/2018/11/retail-black-friday-top-banner.jpg

Best Regards.