I have done a search and can’t find a question quite like this - there was one that pointed to a lost page (working-with-http-authentication)!
My site is for a club (g3pia.net) and they members have to log in to certain pages - the data is held in a MySQL database, they enter details on a login page and if validated, the Session is updated to LoggedIn (and holds their membership ID too).
I have put
<div id="editable" class="cms-editable"> on one of the restricted pages but when I go to edit, there are no editable regions. It does show me a login page (https://edit-content.com/sites/62375/page/1111733/regions) but doesn’t do anything when I put in my credentials and click the login button.