The only thing that I’d changed was the theme to a default theme and the automatic update that had happened.
It’s working now, with all the plugins activated (but now Jetpack won’t connect) so it looks like it might be my host or something :/
Your website needs to be publicly accessible to use Jetpack: site_inaccessible
Error Details: The Jetpack server was unable to communicate with your site https://tm2ts.sarahsmidnightfantasy.com [IXR -32300: transport error: http_request_failed Couldn’t resolve host ‘tm2ts.sarahsmidnightfantasy.com’]