Can't upgrade Blogger

I tried to upgrade to the new Blogger and got a notice that they failed. They told me:

"Thanks for your interest in the new Blogger in beta. An error has occurred that has prevented us from switching your account at this time. Our engineers have been notified of the issue, and your blogs and Blogger account should not be affected."

They went on to advise me to try again some other time, said I can still log in the old way, and thanked me for my patience. I suppose this is a hint that I am not ready for the change after all?