Inability to add a card to Apple Pay

Greetings, Dmitry1708!

Thanks for reaching out to the Apple Support Communities! It sounds like you're having an issue adding a card to Apple Pay. Let's start by trying the following suggestions, then test if you're still unable to add the card to Apple Pay after:

1. Update your iPhone, iPad, or iPod touch to the latest iOS available.
2. Since your iPhone is currently connected to cellular data based on the screenshot, connect to Wi-Fi instead. If you already tried connected to Wi-Fi, try another network and see if there is a difference.
3. Check that the date and time is set correctly on your iPhone: How to get updated time zone information for your Apple device
4. If you're currently using a VPN, temporarily uninstall it.

We also suggest checking out this article If you can't add cards to Wallet to use Apple Pay.

Keep us posted on the results.

Cheers!