So I have a Blockchain.info legacy wallet and have tried to login to my wallet.   Everything is going fine, I have always written down all my passwords..  I enter my wallet id and password and wallet loads but opening page tells me that in order to upgrade to V3 i need to enter my second password.    The thing is I have never created a second password, I have only used 2fA and I have that password as well.  It doesn't work here.    I have a 15 word phrase for both my 1st password and my 2fA password.   I am also pretty sure no one has accessed my wallet because I control the verifying email account and have only been emailed when I have used it.   I never needed a second password to login before and have never created one.   Can anyone help me on this?     I have heard of using classic chrome extension to get in and look at second password but when I verify the email to allow access the chrome extension wont open.   Please help!

Thanks!