Facebook company page has no Admin

I've just started working for a company as Marketing Coordinator and would like to become the company page Admin (or at least an Editor).

It appears that the existing page (which hasn't been managed for a couple of years) has got 2 Editors and 1 Moderator but nobody is assigned as Admin.

I believe only an Admin can assign new roles, so I'm not sure how I can be appointed to manage the page. Surely there must be an Admin? Is this a glitch?