To add ejabberd and run MYSQL to the server I needed to update the server version of mysql from 5.5 to 5.7.  Fortunately, there are great instructions on the Plesk support page regarding how to achieve this outcome. https://support.plesk.com/hc/en-us/articles/213403429-How-to-upgrade-MySQL-5-5-to-5-6-5-7-or-MariaDB-5-5-to-10-0-10-1-10-2-on-Linux As a point of reference, as I worked through the steps... step 10 you need to restart the MYSQL server.  This is a quick progress by...