When I attempt to add the changeset review coverage gadget into a confluence page, all appears to work well (I can configure the plugin, and in the preview it will show me the review coverage properly). However, when I press insert, I then get this:

Notice that the save button is greyed out. In addition, if I try to click cancel or preview, nothing happens. The only way out of this page is to navigate away at this point. Anyone have any ideas? Thanks!