Regarding the issue with entering the additional content, please review the following information:
■ Please verify that there are no errors in the characters entered for the "Product Code."
■ Confirm that the "Product Code" has not expired.
Please note that during maintenance or in case of issues with the PlayStation Network, you may encounter difficulties in entering the product code. For information on PlayStation Network maintenance and issues, please refer to the following link (you will be redirected to the Sony Interactive Entertainment website): https://www.playstation.com/en-hk/support/?country-selector=true
■ Ensure that the country or region of the game matches the country or region of your PlayStation Network account.
If you have used a "Sony Entertainment Network Account" registered in a different country or region to input a "Product Code" intended for use within Japan, you may encounter issues using the "Product Code."