header disappeared in desktop and mobile view

I had created a header using a template in elementor pro. It showed up fine but on Sunday when I visited the website it disappeared both on desktop view and the mobile view header which was a toggle button. I tried to make a new one or edit the existing using elementor pro templates but whichever header template I try to use, it does not even appear on the elementor builder mode. So now, I have no header, no menu on the website and no clue what to do. Can you please advise?