Everything was hunky dory.
Site at tch.wordwideweb.co was mapped to TwinCitiesHeadshots.com
I changed the original subdomain of the main site to twincitiesheadshots.wordwideweb.co
Now anytime I visit the site's frontend, i get 404 errors.
Failed Fix Attempts:
I changed it back to tch.wordwideweb.co, 404.
I deleted the mapping from within the subsite's admin panel, 404.
I deleted the plugin and reinstalled it, 404.
What do I need to do to this plugin to get it to not 404 after changing a site's url/domain?