I just signed up for an Stack Exchange account. I am trying to log in on Area 51, but I get a No login found error.

Specifically,

1. I go to https://area51.stackexchange.com/

2. I click on log in which is a link to https://area51.stackexchange.com/users/login?returnurl=%2f

3. I am redirected to https://meta.stackexchange.com/users/login?returnurl=https%3a%2f%2farea51.stackexchange.com%2fusers%2flogin-or-signup%2fdelegated%3freturnurl%3dhttps%253a%252f%252farea51.stackexchange.com%26type%3dlogin&cdl=1 that shows

   Completing log in to Area 51
   You will be redirected automatically
   

   (I am already logged in into my Stack Exchange account.)

4. I am redirected to https://area51.stackexchange.com/users/login-or-signup/delegated?returnurl=https%3a%2f%2farea51.stackexchange.com&type=login showing

   Unable to log in with your OpenID provider: No user found
   Log in or Sign up
   

I get identical results using Firefox, Chrome, and Internet Explorer.