Domain confirmation Yandex. Connect?

Question

Yandex.Mail for domain

Hello.
I bought a domain in the IM zone on name.com. I planned to use it as a personal mail, connect to Yandex. Connect. But I can't verify the domain. I added the necessary TXT record with the verification code, however, I get the error "DNS record not found". What is the problem? Several hours have passed since the addition, the result does not change.