Elastic Observability: cannot start in Strigo because of login page

When I click the "Lab" button I get a new tab with Strigo, but it wants either a Google account or an email/password for a Strigo account. This doesn't work with the username/password the course materials provide.

Did Strigo change from underneath your course materials?

Ah, never mind.

One must create a Strigo account using the email address one uses for elastic.co, which was not clear from the instructions.