"Add to Favorites" not working anymore?

I was browsing some of the new skins and came across a real beauty that i want to add to favorites, as a reminder for me to download later when i was on my PC. I clicked Add to Favorites and was presented with an odd message about personal sites, i figured this was because i wasn't logged in.

Once home tried again and was presented with the same error.

Does Add to Favorites not work anymore? Or am i being supremely dumb and missing something.

Thanks guys.