Why can't I edit the page?

Question

WordPress

When editing the main page in Elementor, it gives an error - you must call the_content function in the current template.
Tell me, please, where to insert , as I understand <? php the_content(); ?>
Just ask, without any, go teach, if you don't know, don't take it, just please tell me in which template file it should be present and in what place. Somewhere I read that in single.php, but I'm not sure.