I created a template for each of your Themes using your template plugin. I then created a site using the template, in this case Spirit. I click the + sign to edit or add depending if it was a new image or one from the template and the “Properties” (left hand dev area) get disabled but nothing happens. It looks like it is trying to load media manager or some other editing tool, but nothing happens.
I will try in the base template/website to see if anything is different. If you don’t see a new post, nothing changed between the original and the templated website.