Edit "About the Journal"

I cannot find a way to edit the “About the Journal” in OJS 3.1.1.
Here is a link:
I tried editing it via Masthead Settings and saved the changes, but the public facing page at the URL above doesn’t change. I tried clearing the cache, but it made no difference.
Any help would be appreciated.

is that a static page under Settings > Website > Navigation Menus?

and ping @asmecher, does the current navigation menu code allow users to create pages with paths that collide with the existing handlers? In this case “about”.

No, it is not a static page.

Are you sure, because even the breadcrumb is missing.

Compare Contact | Early Theatre to About the Journal | Early Theatre

The contact page has a breadcrumb because it is a normal inbuilt OJS page that is created according to settings.