If something isn't working with your course the way you'd expect, here is some troubleshooting that may help.
Solution: Visit How to format your course in Notion and follow the exact instructions
Solution: Delete the course you created with the wrong Notion link, and create a
+ New Coursewith the correct link.
Solution: Go into your Notion doc, click Share, and toggle "Share to the Web" on
Solution: Select a different URL for your course