Unable to save my diners card on Dreamfolks portal to generate lounge QR code

I was trying to save my Diners Black card on DreamFolks portal so that I can generate QR code for my brother traveling from Canada to Mumbai. But I am getting this below error. Any idea why? And any other way to generate QR for my brother?

https://preview.redd.it/ck9c6jmvoi4g1.jpg?width=409&format=pjpg&auto=webp&s=d99c39cf3e0fcf415cf03f83273a3665bc27cea1