Hi, I had the same problem but I found a solution. You should not try to login with the QR code, you must enter with your email and password, then it will give a problem to synchronize your bookmarks and information, try to login again, as suggested, but it will not allow it, below it will say if you have problems entering, select that option, once there it will tell you to follow a few steps in www.sync.opera.com, then you will have to press "Reset Passphrase" and then enter with your password, it will work there.