Oracle Solution for Error ora-27411

Solution for Oracle Error ORA-27411

ORA-27411: empty string is not a valid repeat interval.

What triggered the Error:

empty string '' was provided as a repeat interval for a window or a schedule.

What should we do to fix it:

ecify a valid repeat interval, e.g., 'FREQ=DAILY;BYHOUR=8;BYMINUTE=0;BYSECOND=0' for a job that executes daily at 8am.