Comment (by Roland Haas):

Hello Bruno. Thanks for letting us know. Turns out I had forgotten to make the repository “public” when moving it from the nds-org owned repository to an EinsteinToolkit owned one. Naturally, the private repo does work for me. Should be fixed now.

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2740/broken-links-in-the-tutorial-for-new-users