Header Background Image

Is it possible to pull a custom URL field from one of the model to dynamically render the background image for the Skuid Page header?

I followed the below steps for header, but it’s not working.
https://community.skuid.com/t/dynamic-background

If I hardcode the URL the background image is rendering as expected, but when I use the merge field (that has the URL for the image) the background image is not rendering.
Any help would be appreciated, Thanks!