I had this same problem a week ago when I tried to login kept getting message that had to go to e-mail to authinticate, when i went to the e-mail it said someone had tried to log in from a different url, but it was my url, it gave me a link to click to go back and login, but when i did that it never would give me a box to enter my password, just got an error message. finaly last week support sent the same message again and i got in.

Same thing happend this weekend kept getting same error message even when using the whole identifier not just alias, it still never would give me the password box and a grey message appeared at the top right saying it was changing my identifier but it never stopped turning.

this time when support finally sent me the e-mail saying they had reset it I clicked on the link to log in and still no passwrd box.

 Getting frantic, had them text me the message on my phone, when  I went to it there and entered my identifier it gave me the password box I got in and immediately transfered all my btc out to my qt wallet using my cellphone.

Stll cannot get in on my computer no password box ever appears.l

Never believed they were going to take my btc. but what good is a wallet you cannot access when you want to.