Netflix Voucher: Unfortunately, your request can't be processed at this time?

I got a Netflix voucher today and I wanted to redeem it but it does not work, everytime I put it in there "unfortunately their request can't be processed at the moment" because even if you enter something there's there "Unfortunately, theirs request is not currently being processed "is this on the Netflix servers or is the voucher not valid?

It always takes one day until the card is unlocked. Would actually have to be on the card or on the cardboard packaging that it takes 24 hours until you can use the coupon.

Probably that somehow serves the theft protection that only unlocks cards that are also sold and the exam probably takes a bit.