Thanks Kostiantyn. The issues is your note - "Restarting the Day Communique Tagging OSGi bundle will only register the New Location as the tag root if the Previous Location is empty. " Deleting the content at /etc/tags and restarting corrects the problem.

I'm working on an AEM 6.5 server that was migrated from an earlier version. Some of the steps were not strictly followed, however - I don't know the full story but I'm guessing there were actual regression problems or just no practical way to test. One example of this is when I go to Tools > General...