How to fix Socket connection error (Yandex Kassa)?

Question

1C-Bitrix

I connect Yandex Cashier through a standard module. When paying, it says "Socket connection error", although when checking the system there are no errors with sockets, there is an SSL certificate. I connected it according to the documentation, everything is connected on the Yandex Checkout side. Nobody faced? Online store version: 20.5.0

UPD:
The problem was in the old OpenSSL

Answer 1

Have an SSL certificate

This does not mean that it is installed correctly.
Check here that you have an A+ result. And stream_socket_client
is running on the server . Probably, you need to contact your server administrator.