It showed up for me as well right now, but I had my interview back in January. All I had to do then was send a "New message" confirming that I will attend, no new submissions.
If there is no special application regarding the confirmation under "Navigation menu" on the left under "Application and Funding Overview", then sending a "New message" should be fine. Also, congratulations! Which country did you apply from?
LOL I had my interview for Master for All Academic Disciplines (mid January) and they mentioned I won't be getting any results until April. Ridiculous.
My bad, it wasn't October, it was December, so it took about a month. I applied for the winter semester. The date of my interview is actually one of the two possible dates stated in the initial message, so that would be the 17/02/2021 to 18/02/2021 in your case I assume. I was notified 7 days before my interview. Thank you, I'm sure you will too!
I got the same notice back in October also for All Academic Disciplines. Just now, my status changed from "paper copies received" to "preselection made" and I got an invitation to a video conference that will be held in a week! They also state that within two weeks after the interview, I will know the final results of my application. Good luck everyone!