Thank you for the text courses!
It seems there is a problem with the HTTP request node in Level 1, Chapter 5.1 (“getting data from the data warehouse”). The dataset URL does not respond with the warehouse data, but with the message “you must specify a unique_id header and value”. In my case I’m sure I provided that header value (of course with the unique id I got from the email).
There’s also a post in the community forum:
Regards,
Marco