This link does work, anyway I started taking the course in the 2022 version
I think UiPath Academy will have to clean up this URL mess a bit by changing the site.
By analyzing the URLs a little I could see that the course would not be available to me because it links to me in this format:
https://cloud.uipath.com/myUser/academy_/courses/building-a-reframework-project-with-tabular-data
If I copied the link it had the correct format but without the version, and I think that is why it gave the error:
https://academy.uipath.com/courses/building-a-reframework-project-with-tabular-data
And the correct format would be this:
Thanks for the help.