Header appears doubled

Hello everyone,
I’ve been working on my website using Elementor Pro and Theme Builder. It has worked great, until recently, when I noticed one of my pages showed a double header (two headers appear superimposed). I have read through all the troubleshooting documentation and tried rolling back to older versions, but the header issue remains. So I deleted the page, and created a new page from scratch, and the problem persists. I tried creating a few test pages, and the same thing happens to them. I created the header using Theme Builder, and I use the template on my entire site without any problem. The header functions well on all the ‘old’ pages except ‘Portfolio” and any new pages I try to create.

This is my first ever attempt at creating a website, and I am not coder or developer, and I can’t figure out how to resolve this. Can anyone please help?

Thanks in advance everyone!

• This topic was modified 4 years, 3 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic

The page I need help with: [log in to see the link]