In the [Blend spaces Documentation page][1], the four primary categories linked at the bottom of the page all lead to a message stating “You do not have access to view this page within the site.”
Edit: I was logged into the site at the time as shown in the following screenshot.
You need an Unreal Account. I have tried it now. Little bit wierd cause you have to sign in again and then you get an activation code to your email adress again. But after that it works as expected.
I was logged in at the time. If not logged in I am prompted with a login form, and after logging in I am presented with the message as noted above. Screenshot attached.