Hubspot CMS for Developers unavailable

Hi, I want to start the course CMS for developers but after signing in, it is not available (the page gives the “All who wonder are not lost” 404.)
The second part of best practises works normally but I want to do this one first.

Can someone help me?

I completed the course earlier this week and submitted the practicum as part of the certification requirement. Today, I recieved a “Congratulations, you passed” email but it goes to a blank page and the link to the course is greyed out as well.