Minecon Cape Is Not Redeeming

Hello there Mojang, I have a problem. Today, my friend gave me a Minecon code for a 2016 cape. This is the code: https://minecraft.net/redeemCape/ZDliMzQ4NjM4YmVjNGRiMzk1MTAxMmEyMGIwZjkzYzI%3D

I follow the regular instructions on how to redeem a cape, however, when I enter my email and password for Minecraft, it goes to the profile page. Please help.