There was an issue with Moodle's enrolment script that affected most students today (28/07/15). Most students would have noticed that their courses for 2015 were missing. This issue started after 2pm today and was caused by the enrolment process that crashed. Between 3pm - 5pm several students could not access their courses for 2015.
This issue has been resolved and all students should see their courses now.
We sincerely apologise for the inconvenience caused by this issue.
... Learning Systems Team