You are automatically enrolled for the courses in the 1st semester of your 1st year only. From the 2nd semester (period 3 and 4) onwards, it is your own responsibility to enrol for all courses (required courses, optional course profile ones and courses that are part of your dedicated minor). This means you will need to enrol for your 2nd semester courses yourself.
You can enrol for a maximum of three courses (22.5 ECTS) per period during the designated enrolment period via Osiris Student.
Furthermore, please also make sure you (re-)enrol for the Bachelor's programme via Studielink when you enrol for your semester 1 courses.