I had used Moodle a while back but that project has had a period of inactivity. We're looking at getting it back going and for other reasons one step in that process is a server migration. I tried both the new host's automatic installer and manually uploading and extracting files for Moodle 3.9.1 -- either way all I can get from it is the least informative error message ever:
[an error occurred while processing this directive]
How do I troubleshoot this?