Are you logged in as an unverified user?

You can join a meeting without logging in, but this is not very reliable.

If your teacher tells you that you are "not verified", you will probably see this screen when you log in. Then do not enter your name, but click on the sign in link at the bottom.

Then enter your Semper account and log in as normal.

You will return to the first screen. Then, click the button Join now.