The error message is: Oh no! Unfortunately we can't activate Twitch Prime in your account. It looks like there was an error activating Twitch Prime.
Common issues are credit card issues for Prime if the credit card may be invalid or declined.
Your credit card may be invalid or has been declined.
But it is not.
Do you have a credit card at 15?
No, but a bank account or an ec card, which is completely legal.