I went to Affiliates>Settings and it showed that the Register was included on the list of detected pages.
When trying to visit the page, the
[AffiliatesRegister] shortlink is displayed in stead of the contents.
So then I hit the Generate button on the Affiliates>Settings page to see if it made any difference.
As expected, it did not.
I also tried other aff pages.
[AffiliatesLogin] both fail in the same way.
The only one that seems to display actual content is the Affiliates Area.