Registration is disabled at this time

I got access to the closed beta a few days ago. Now that I have time to check out the game, I click on the link in the mail but get this message: “Registration is disabled at this time.”
What does it mean? I am to late for the registration to the closed beta?
I am really willing to play the game so please someone answers me.

The CTT ended today.
This wasn’t a beta btw.