What does "Payment is available only with tokenized cards" mean in Google Pay?

Question

Payment cards

When trying to pay through a mobile application using Google Pay, an error appears that payment is available only with tokenized cards.
The application gives an error, google pay itself does not even see my card and gives an error: "This seller does not accept any of your cards" Rostelecom's

official application is a personal account. Card - visa, Sberbank

How to connect this tokenization?

Answer 1

Is the card directly linked to GooglePay?
Is it possible to pay with this card from a phone, for example, via Gpay via NFC?
In theory, if yes, then it is already tokenized, and it is strange that the site gives an error then.