I have migrated the Flask Mega-Tutorial content to this new platform, which I think provides a better user experience for students. During this transition phase I am maintaining both platforms, to give you time to migrate.
The old site is still available at https://learn.miguelgrinberg.com. I will not be adding any new content or features there, so I recommend that you start using the new platform. At some point in the future when all users are migrated I'm going to take the old site offline.
Visit your profile page on the old platform for migration instructions.