How To Fix Error
To fix this error, you need to go to TEAMS > Student > Enrolment Centre > Academic > Enrolment Subject/Module screen. In this screen, you have to enter the correct start date which should be before the end/result date of the required Unit of Competency/Module and save the screen to fix the error.
In the below 1st screenshot, Enrolment Activity Start Date is 04/05/2019 and in the 2nd screenshot, Enrolment Activity End Date which is Result Date is 04/04/2019.