pK - 2019-09-27

Hi,
I'm running 1.3.0 from the GIT repo and my reminder emails stopped working.  The emails aren't sent even if I manually run the scheduled cronjob command for the reminder.  I've tried enabling error reporting in the command but there are no errors produced.
Oddly enough, email alerts when a new scheduled appointment is creating are working fine though.

I'm to using PHP version 7.2.22, but I also have 7.3 and 5.6 available, but I think 7.2 is preferred.

/usr/bin/php7.2 -d error_reporting=1 ./send_reminders.php
I'm able to send test emails using PHP using both script examples found here so I know it's possible.https://www.php.net/manual/en/function.mail.php

I'm at a complete loss at this point and am missing appointments without the reminders.
Any assistance would be greatly appreciated.
Thanks,Patrick.