Not able to "enable" store category page

When I hover over the toggle button to enable this page, I get a red prohibition sign (like a circle with a line through it, not showing in the screenshot though). Below, you can see the page I'm talking about. Why is this happening and how do I enable the page? 

Thanks! 

It appears SS has a bug in their user interface. The Edit Category panel should not have an Enable Page toggle. That element should only be in the General tab. Use the one in General and it should work.

Let us know how it goes.