Hi,few days ago, I contacted again the Cisco Support and finally the problem was resolved. My account was under federated status which did not allow me to login. 

I have the same identical problem. I tried to unlock the account but the problem persist. My workaround is the follow: 1 in login screen enter a false email address (if I enter my real id, the login’s page stuck in infinite loop..)2 in the pwd screen...