Installed Moodle 3.9 and was trying to get LiveSchool to work with the system. I am having trouble contacting LiveSchool????
Bob, the plug-in MAY work until 3.8 without hiccups (give it a try) as for 3.9, still there are plenty of plug-ins in que to be updated, usually the plug-ins that are in high usage get updated right on or before new moodle version launches.
You can however ask the plug-in developer for any updates, some developers share plug-ins which they develop for their own use with the moodle community, and they rarely visit moodle site, contacting them directly sometimes work as reminder to update plug-ins.