Broker SSL Issue

Hi all,

We have CC cluster and as we tried the client code in documentations, we only managed to connect to the default cluster when SSL verification is off, when logging all we can see this error:
Broker did not provide a certificate (after xxxms in state SSL_HANDSHAKE)
Now we’rereally confused, is this server or client side? what are the missing client configurations regarding sasl_ssl in such case?
As note we’re using node-rdkafka and let’sencrypt certifications already installed, I think there is something on server side please advice