All links on my home page lead to a “you must be lost” page. Plex is completely non-functional.
The answer was to completely uninstall the media server component and then reinstall it from here
https://www.plex.tv/media-server-downloads/
Then when it asks to upgrade click on skip this version.
Thanks for wasting an hour of my time. In the future please beta-test your updates before you roll them out on the unsuspecting public,