WP Newbie here. We inherited a blog site that was built on the WP-Rye theme. It was a bare bones setup without a number of admin functions non-tech users need. One thing missing in the Admin Dashboard menu is the Pages > All Pages and Pages > Add New menu set. I've tried to understand how to get it back, but no joy.
What this leads to is that we want to activate the Subscribe By Email widget so folks can receive notice of new posts. However, when I try to configure it, there is no way to create or select a "Subscribers Management Page" where users can subscribe/unsubscribe to post types/categories. (See attached screenshot). I've set up a local dev site using WP 4.4.2 and the Twenty Sixteen theme and can create pages and configure the widget OK.
I've looked all over the Web, Wordpress.org and your forums and haven't been able to figure it out. Aside from completely reconstructing the look and feel of the blog from scratch, which would take some heavy learning, I'm at a loss.
Any help will be appreciated