I've got a similar problem, but with newer iOS version. I'm trying to set up on new iphone, but it won't accept my master password. I can still log in using a browser on the phone and laptop as well as the mobile app on my iPad and old phone. Obviously, I know the password, the problem is that I can't confirm the new device. I've deleted the iPad as a device in my advanced settings and re-verified it with no issues. The confirmation email is never sent for the new iphone. When trying to log in using wifi, it tells me to check my password and try again. When using data, it tells me to look for confirmation email. I keep checking my inbox and junk folder, but it never comes. As mentioned before, the process works fine on my iPad and old iphone. I've wiped the old phone so I don't know what version was running there. I'm fairly certain it was 16.2.1. The new phone is running 16.3
