I use external database verification throughout my moodles. My moodles are old. External database is set up in enrollment plugins and works fine in older courses. My host is Siteground and they aren't admitting to anything that caused this not to work starting in the past couple of months. Because it has happened to moodles set up in more than one domain, I suspect they should know. The PHP is set as before.
When I create a new course, or re-visit one that never used external database verification, external is not listed in the dropdown menu or as a choice. Can I add it back somehow?
It is listed in the config file: