Admission / Admission Settings / Online Enrollments / Basic Settings / Available Student’s status
Here you specify available student statuses which can online enroll in modules.
Online enrollment is also depending on the “Enable Student/Parents Enrollments access for the following Faculties” setting, which must include the *Faculty of the student who wants to enroll online.
Also, for online enrollment to be available, the date in the “On-line enrollment Start Date” setting must be earlier than the date you want to enroll.
Example
Francesca Grixti is Registered student, as shown below
Setting -> Registered
The online enrollment is open and the student can enroll properly
Setting -> Candidate (Submitted application)