If you forget the email address associated with your account, please search your inbox and history for emails from noreply@acm.account.sony.com.
Your change of the Sony Group account information generate messages to the email associated with your account.
Please check if Caps Lock is activated on your keyboard.
Passwords are case sensitive. A common mistake is activating Caps Lock on your keyboard then typing uppercase letters when you meant to type lowercase letters.
View characters as you enter using the "eye" icon.