I can't see an add to wallet button under my prepaid center MasterCard

Even though I have the app "my card wallet" The add to wallet button appears for old cards but not one that I just redeemed on the website. Has anyone had this experience? How can I get around it so I can add my card to Google wallet? I have already tried pasting the card information directly into Google wallet, to no avail. I just got an error message.