I just upgraded to Sitefinity 8 from 7.3. For the upgrade I uninstall feather and then enabled it in Modules Admin after upgrading to 8. I made an "MVC only" page template and added a few widgets to it, including the MVC Navigation widget. Whenever I click the "Edit" button on the Navigation widget to change the settings, the screen flashes the little loading symbol and then just goes back to my template without showing the Edit dialog box.
I tried with a Hybrid page and it does the same thing with the MVC Navigation widget. The Webforms Navigation widget works fine.
Is this broken? Does the MVC Navigation widget have any edit options?
Update: It works locally but not on the test server.