Free Ali Skin

Attempting to use the link to redeem the unchained Alistar only brings up a blank page. I have subscribed to the YouTube channel. But am unable to discover how to get skin through normal means. Please see the attached screenshot where I am signed in and subscribed to RiotGamesInc YouTube channel. And the second page where the http://youtube.na.leagueoflegends.com/en/youtube brings up a blank page. If unchained Alistar is no longer available I understand, and this ticket can be disregarded after I am notified of such. Otherwise can someone please direct me on how to resolve this issue? Thank you,

MalioFantango