If the password is disappearing while trying to register, please ensure that you choose a password that is 8-16 characters long, contains only letters and numbers (no special characters), and has at least one capital letter.
Please also make sure that you’re entering the security code on the registration screen. If you have any doubt as to the characters that are there, press the circular arrow to refresh the code.
You’ll also want to make sure your region is set to North America, regardless of your actual location.