Did an update on a couple of plugins but now...

View this screenshot:

FYI, I have disabled the display of system messages so it won't display if you go to the website but the issue is still there. But to help with diagnostic, I have activated system messages on this page:

aztecrealestate.net/sitemap

I got an update notice on a couple of plugins and installed them. But then we get this warning on pages. I went to the Extension manager but got a 404 error. I reinstalled the Extension manager and was able to accesss it via the Components > Regular Labs link. There were two updates for plugins which I updated as well as reinstalled all installed plugins, which are the ones displayed as NOT installed yet they show as installed on the Extension Manager.

So I installed an older version of Articles Anywhere v8.5.0-pro, cleared cache, loaded page but no change. it still shows that plugin as not installed. I went back to the Extension manger and updated Articles Anywhere. No change.

FYI, this site is running Joomla! 3.10.10 on PHP 7.4.30.

Any idea how this got broken and can this be fixed?