If you’re using a personal device, rather than one that your school has provided, this error may occur if your parents/guardians have Family Link enabled on the device which is blocking Google Sign-In on our website.
Share this link with your parents to have them remove those restrictions: https://support.google.com/families/answer/9204736
If you continue to have trouble, talk to your teacher about having them set a password for your account so that you can still access Edpuzzle by logging in with your email and that password, and not by using Google Sign-In.
Your teacher can learn more about setting your password here.