Investigate significant number of javascript console errors with blank database state

I'm not sure whether this is a bug which manifests only with an empty database state or not, but these errors should be fixed. This is all on the index page, but the errors continue to appear on other pages while logged in as the admin user.


Start by reproducing the reported JavaScript console errors with a blank database on the index page while logged in as an admin. Check whether the same errors occur on other authenticated pages, then identify their sources and verify that the console is clean in those scenarios.

Written by the indexing model from the issue text.