Unable to connect to CP


My CP is in OCP and my DP is in on-prem on linux. I am unable to connect to DP. It is giving below error.
2023/08/24 18:04:08 [error] 2422#0: *593 [lua] data_plane.lua:287: communicate(): [clustering] connection to control plane wss://control-plane-apim-app-eag.apps.fsk-hk-np1.ocp.dev.net:443/v1/outlet?node_id=259e8090-7148-4696-81b6-ae9a3bed9d25&node_hostname=hklvatapp200&node_version= broken: ssl handshake failed: 19: self signed certificate in certificate chain (retrying after 9 seconds) [control-plane-apim-app-eag.apps.fsk-hk-np1.ocp.dev.net:443], context: ngx.timer

I have given same cert in cp and dp config and also lua-cluster-ca-cert. Still it is throwing self-signed cert error.

Curl Output:
curl -i -X GET https://eag-gw-cp-sit-kong-admin-apim-app-eag.apps.fsk-hk-np1.ocp.dev.net/clustering/data-planes -H Kong-Admin-Token:xxxxx -k
HTTP/1.1 200 OK
date: Thu, 24 Aug 2023 18:13:46 GMT
content-type: application/json; charset=utf-8
x-kong-admin-request-id: 0cInknzB1KLxVghKLfgQ0NskrEJ0OHWn
access-control-allow-origin: *
content-length: 23
x-kong-admin-latency: 562
set-cookie: 65ff06f14cbc51aae5a44c871b7b9c51=08a565f3a883adf05832b2e2a4d39311; path=/; HttpOnly; Secure; SameSite=None
cache-control: private


Can anybody help please? @hbagdi