In the learning path, it is telling to go to the developer portal,
his course was actuallly made with an older version of Mendix, so many of the things are updated now,
You can mark your sprints as completed, like this now,
refer to the image below,
Hope it helps!
However, even if I transition to the "Developer Portal", the "Development" item does not appear. Shouldn't this be displayed in the sidebar menu in the settings?