Can't Login to Support

Whenever I login on the support page, it says "Signing you out" immediately after.

The URL I get redirect to is: https://login.support.riotgames.com/error?error_code=CLIENT_ERROR&selected_locale=en-us

Things I've tried:

• Using FF, Chrome, Chromium, etc.
• Clearing Cookies and Cache
• Waiting a few days

Needless to say this is kind of a bummer since there doesn't appear to be any other way to contact support directly.