I think I have found the problem / solution!
I found these errors in the cron log:
tail /var/log/cron
Aug 2 13:10:01 precendo CROND[15661]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
Aug 2 13:10:01 precendo CROND[15663]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
Aug 2 13:10:01 precendo CROND[15664]: (root) CMD (/usr/lib64/sa/sa1 1 1)
Aug 2 13:11:01 precendo CROND[15774]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
Aug 2 13:11:01 precendo CROND[15775]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
Aug 2 13:11:01 precendo CROND[15776]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
Aug 2 13:12:01 precendo CROND[15852]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
Aug 2 13:12:01 precendo CROND[15853]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
Aug 2 13:12:01 precendo CROND[15854]: (CRON) ERROR chdir failed (/home/asterisk): No such file or directory
This led me to find this post:
I ran this command to add “/home/asterisk”
mkhomedir_helper asterisk
Now my cron log looks better. It includes the schedtc.php as expected.
tail /var/log/cron
Aug 2 13:16:01 precendo CROND[16192]: (asterisk) CMD ([ -x /var/lib/asterisk/bin/schedtc.php ] && /var/lib/asterisk/bin/schedtc.php)
Aug 2 13:16:01 precendo CROND[16193]: (asterisk) CMD ([ -x /var/www/html/admin/modules/dashboard/scheduler.php ] && /var/www/html/admin/modules/dashboard/scheduler.php)
Aug 2 13:16:01 precendo /usr/bin/crontab[16205]: (asterisk) LIST (asterisk)
Aug 2 13:16:02 precendo /usr/bin/crontab[16207]: (asterisk) LIST (asterisk)
Aug 2 13:16:02 precendo /usr/bin/crontab[16208]: (asterisk) REPLACE (asterisk)
Aug 2 13:16:02 precendo /usr/bin/crontab[16210]: (asterisk) LIST (asterisk)
Aug 2 13:16:02 precendo /usr/bin/crontab[16212]: (asterisk) LIST (asterisk)
Aug 2 13:16:02 precendo /usr/bin/crontab[16213]: (asterisk) REPLACE (asterisk)
Aug 2 13:16:02 precendo /usr/bin/crontab[16215]: (asterisk) LIST (asterisk)
I suspect that this will solve the problem as well as some others I may not have noticed.