If there is no email address associated with an account, it's impossible to use the password recovery feature.
To avoid problems next September and facilitate student activation, make sure that your students have registered their email addresses in their accounts.
How can I check if my students have added their email address?
Simply go to the Class management menu in the navigation bar in your teacher account.
From there, you can select your group and you will see a list of your students. For each student, you will have the following information:
If your student has an email address registered in their account, it will appear in the column labelled Email.
If this is not the case, you can ask your student to enter their email address in the My account menu in their profile. You can also select the blue pen on the right of the usage columncolumn. From there, you can add an email address to the student's account yourself.