When adding a new page, the auto-nav stack and main block of my theme are unavailable to my editors
I am building a website in which I have an admin and a group of editors who can edit pages. In addition, they should be able to add pages as well.
I have a problem related to the latter functionality. When I try to add a new page as an editor, either publish it immediately or edit it, the auto-nav stack and main block of my theme (modified Elemental) are unavailable to my editors. The auto-nav stack comprises my navigation. By main block I mean the area to which I can add content blocks. The header and footer are fine, but the page body is not. There I have just the 404 error page not found.
However, as an admin, I do not have this problem. Everything works perfectly.
So, could this be some kind of permission problem? Or something else? I have tried clearing my cache and modifying my permissions multiple times, but I just cannot figure this out.