@william_dastrup
The number at the end indicates there are multiple instances of a page with the same name.
I would assume, your original "Course Home Header" had been deleted which resulted in the blank edit page when you're trying to open the link.
Canvas doesn't permanently remove many of its components (E.g. pages, assignments, files, announcements, etc.). When you delete something, most of the time it will go to /undelete page. You can try to restore the original page by adding /undelete to the end of the course URL (E.g https://YOURSCHOOL.instructure.com/courses/12345/undelete )