problem

Hi there I installed elementor and elementor pro, but if I try to edit a page with elementor I got this allert message

Sorry, the content area was not found in your page. You must call the_content function in the current template, in order for Elementor to work on this page.

Is not a <?php the_content(); ?> problem, because in my theme page template there is <?php the_content(); ?> function.

Why I got this issue? Can you help me please?

Thanks