Describe the bug

Some courses cannot be set to "TA Mode".
Example courses:

• CS2103T
• CS3281

To Reproduce

Steps to reproduce the behavior:

1. Add either one of these courses to the timetable
2. Click on TA Mode Button
3. Nothing happens (no errors too, in console)

Expected behavior

TA mode is enabled

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version 131.0.6778.205