On your MySQL Server doing backups you get:
Backups Failing: Dumping MySQL database database_name .... dump failed! mysqldump: Couldn't execute 'show events': Cannot proceed because system tables used by Event Scheduler were found damaged at server start (1577)
Try this:
mysql_upgrade -u -p
If that doesn’t work, do this:
mysqlcheck -u -p --all-databases --check-upgrade --auto-repair
To test, use ‘database_name’ and then do show events.