When having app open in public instance with selected node. Then deactivate or delete the structure which contains selected node on author instance. This lead to "Internal error" and crashes whole admincentral on public instance and after refresh the admincentral deactivated/deleted content is still visible(in weird state).

How to reproduce:
1. On public instance select "article" page (/demo-project/about/subsection-articles/article)
2. On author instance deactivate "about" page (if workflow is used then approve it)
3. Go back to public instance and try collapse the "about" page
4. It leads to "Internal error. Please notify the administrator. Take note of any unsaved data, and click here to continue."
5. After refreshing the admincentral by clicking on "click here". The deactivated pages are still presented in tree, but they are missing their icons and are moved to the top level