An intentional safety limit
The invitation is valid for 7 days.
The link you received is valid for 7 days from when it was sent. This is intentional: an invitation is not left open indefinitely on a number that may change hands.
Has the invitation expired? Ask your school to resend it. A student-affairs member can do this in a minute, and a new 7-day invitation will arrive. You do not lose anything and your child’s record is unaffected.
A second route
You applied and were accepted.
If you applied for your child through the school directory and the application was accepted, you do not need an invitation: an accepted application opens the space automatically.
When the school accepts the application, your child changes from applicant to student in its system. Their space appears in your existing account — with attendance, timetable, and fees — with no extra step from you. Admission remains the school’s decision in its own system; the platform carries and notifies, but does not decide. Your child’s data goes only to the school you chose.
School application guide