ps plus voucher code not working

If you are under 18, your PSN child account does not have a PlayStation Store wallet associated with.
What youll need is a PlayStation 3 or a PS Vita and your main account which you will be or are using on the PlayStation.
Error Messages "An error has occurred (WC-40377-1 the PSN Card was not activated by the retailer. .
The benefit of doing so is that it carries over to all devices.If you are redeeming a non-PS code, you can also try Sonys website by simply navigating.Only the retailer can activate a PSN Card.Let us know in the comments below.Check with the retailer to make sure the card has been activated.Only a retailer can activate a PSN Card.PlayStation Store Cash Cards and PlayStation Plus Cards must be activated by the retailer.We hope Sony stabilizes the network soon."The code you entered may not be correct or may no longer be valid.They will then need to set up a Monthly Spending Limit, which will allow you to spend the funds from their wallet.Other PSN features such as log-in, online multi-player gaming, PlayStation Plus trial, PS Store (excluding voucher redemption trophies, messages, how to discount calculator friends etc.Sony suspended the service in order to stabilize the PSN network and not cause the code redemption end in a failure and the lost of code.Will you be redeeming it this way?Redeem the PSN Card once the face value can be put into the Wallet (a partial redemption is not possible).Yesterday Sony suspended code redemption for the PlayStation 4 as many were facing PSN issues such as cannot log in, due to high traffic on the server.Please check your entry (WC-40376-0).".Playstation 3, playstation 4, pS Vita).PlayStation Store On The Web, signing in with your details and then clicking on your PSN name, dropping down a menu and selecting Redeem Codes.Network issues may prevent the code from being redeemed.
Simply log in to your account on PlayStation 3 or PS Vita with your account and redeem the PlayStation Plus or PS codes.
The country for the code may not match the PSN account.