Report scheduling is disabled code 2406 occurring at the same time every day.
Report scheduling is disabled.
System > Settings > General > Configure > "Do not allow sending of reports and alerts"
This setting had been selected after a report had been created and scheduled for daily distribution.
Review the list of reports found in System > System reports for any configured schedules.
Any report scheduled while "Do not allow sending of reports and alerts" is enabled will generate the Event Code 2406.