The page is a simple WordPress page built with elementor. There are no Toolset functions built into this page
I have given you admin access, if you log in and activate the Toolset Layouts plugin, and then view hidden link you will see how the contents disappear.
I built a new page, with a single elementor element (no toolset features) and I get the same problem with new pages
You have a Layout assigned to Pages (i.e. it is the template used to display pages), but the template is empty (screenshot), so outputs nothing. It's not assigned to all pages, so those pages that do not have the template assigned will display as normal.
Given that it is an empty template it's redundant, so you should likely delete it. (Before you can trash it, you need to change the usage so that it is not assigned to anything.)
You also have an empty Layout template for Rooms, which would have the same problem.
Maybe you don't need Layouts on your site at all and you can delete those templates and delete the Layouts plugin?