ORA-20446: The owner of the job is not registered

If you have encounter the following error in OEM, while creating job, etc:

ORA-20446: The owner of the job is not registered ORA-06512: at "SYSMAN.MGMT_JOBS", line 168 ORA-06512: at "SYSMAN.MGMT_JOBS", line 86 ORA-06512: at line 1

please execute following command after login into database as sys:

execute MGMT_USER.MAKE_EM_USER('USERNAME');