Sticky header CSS makes editing with elementor impossible

Hello,

I set up a header with your plugin which works fine. I then used the CSS of your link (https://ultimateelementor.com/docs/sticky-header-with-ehf/) to make the header sticky. When I want to edit the header with elementor, I cant access the header anymore. The “drag a widget” thing is in front of the header. Can you please help me?