Perch 2.7.2 adding pages and editing page option issues

Hello,

Since updating to 2.7.2 I've have some problems with adding and editing page options.

When I add a page I get a blank screen at perch/core/apps/content/page/add/ after visiting the page I've hopefully created it does show up on my Page List in Perch. When trying to hide some pages from the navigation. I get the success message but they aren't being hidden on the front-end, and the option is deselected again in the admin.