I am trying to use the header/footer builder tool that comes with the Soledad theme, but it doesn't seem to be working. When I drag and drop items to build the page, nothing appears in the space it is supposed to, and when I try to preview the work done, it still shows nothing. 

I am using theme this on a staging site and I also have Elementor Pro installed. 

Thank you, that seemed to work but now I am getting a notice on my dashboard that the system cannot detect my purchase and to activate the theme. I am using Soledad theme on a staging site so when I try to enter the purchase key, it says that key is already activated on my actual website. Am I not able to use it on my staging site? 

Thank you, it's https://staging2.stellanspice.com