I keep getting the page that shows the new rules update, that I already accepted the other day.
I'm wanting to list the Amiibo cards I have available for trading.

It's a known glitch right now, but some people are able to fix it by clearing their cookies and cache. A workaround for now is accessing your profile by clicking your username from one of your posts.

Thank you for the helpful hint. It worked that way. Now I have my Amiibo cards listed in my profile for trading.