Double-check that they are typing in the exact username and password that you have on your account. View the student's profile to double-check that there are no typos in the username (triple-check, this is the issue 99% of the time😉)

Usernames and passwords are CASE SENSITIVE, so double check that too.

Typing in the correct username but still getting an error message? That means that there is a typo in the password! Reset the password, and your student will be good to go :)