This was actually pretty easy to fix. Corrected file permissions in DocumentRoot, and allowed overrides in the Apache config, and it's working. Now the real fun begins.
I have a Drupal 7 site currently running on an Ubuntu server managed by Plesk, and I'd like to move it to a Debian server so that I can upgrade it to the current Drupal version (10).
So far I've tried simply copying the site files and the database, and creating a new vhost file, but that has not...