I can not access to wallet on Dogechain.info, Invalid 2FAs code

[hastiAu]

I have received an email from Dogechain.info to transfer fund last week , when I want to login , when I fill my password , for just one time it send me 2FA code to my email , but it was just one time , the it does not send again , then I see a form that I send my name and city but then I could not login finally

then I wanted to try with 2FA.com application, I had back up file and I restore it to get code, but when I want to login to dogechain.info it does not accept the code that I receive it from 2FA application , and said it is invalid code , and it does not send 2fas code to my email too and I can not login to my account at all.

more over i have a exported encrypted file that I don't know how can I use it :the file start with :

salt(+xTuGfX+WWf/Tzb5AYv1TA==) ......

I send email to block.io but no body answer me.

just in case I create new wallet in dogechain but in that one I receive the code in my new email for new wallet

I am trying to decrypted with this help

but I use this code the it asks me password, I send my wallet password but I see this error:

enter aes-256-cbc decryption password: error reading input file

but when I just entered it pass and nothing happen ,

I can not to Dogechain site and can not get 2fa code on my email and any application , so I am trying to decerped my encrypted file to get private key