How to fetch the Leaf Node value from lyd_node* received from server in Netopeer2 Client?

Question

I'm using Netopeer2 library for Netconf client and server. Command line program source codes of client and server are available.
In client side, upon executing get-config for specific yang model, the response is printed in the command line.
However I want to fetch the value of the Leaf node from that response and use it for my application. The response is received in lyd_node*.

I got the hint online to use lyd_find_path() of libyang to do this. I called it like this:
LY_ERR ret = lyd_find_path(op, "/etsi-qkd-sdn-node:qkd_node/qkdn_version", 1, &match);

Upon debugging lyd_find_path(), I found that it is failing at the line
ret = ly_path_eval_partial(lypath, ctx_node, NULL, 0, NULL, match). The error value is: LY_ENOTFOUND