I wasn’t able to find a good category to put this. But since this is a sponsored event I believe this is the most appropriate place.
Currently the ROBLOX Creator Challenge shows a broken link.
As you can see the link shows http://rbxl.co/main-page which doesn’t work.
The correct link is Galactic Speedway | Roblox Creator Documentation . The L and X are flipped in the GUI.
Sorry if I didn’t put this in the correct category but there is no Sponsored Event Bugs so I believe this is the most appropriate category. I hope this report helps new players avoid confusion.