Main Tag is missing

Hello!

I am using this theme for the first time for a customer project. The site was first created (not by me) with the Twenty-Twelve theme. But there were several problems, which is why I chose the Elementor theme.
Now I stumbled upon the fact that there is no main tag.
The header and footer were set up via the plugin, the rest normally via the creation of the pages.

Elementor Full-Width is selected as the default page layout.
The pages themselves have “Standard-Theme” selected. But even if I switch to Elementor Fullwidth, the setting does not change.
Which setting am I overlooking?

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