Apple Pay "Payment Not Completed" with sandbox

Hello.

I am set upping Apple Pay for my project.

I use Magento with Adyen extension(we are working through adyen as a payment gateway)

I've passed configuration tests described in https://docs.adyen.com/developers/payment-methods/apple-pay/enable-apple-pay

And created sandbox account according to https://developer.apple.com/support/apple-pay-sandbox/

But I get "Payment Not Completed" message every time i try to pay. I've been using Simulator of Xcode with sandbox account for iCloud account. Also i did the test with real device(iPhone 8) but got the same result. So that i think that issue not in Simulator but somewhere else.

The main issue for me is that i cannot find any logs, which could tell me what exact issue with my setup.

Could someone help me to resolve this issue?

Thank you.