Self signed certificate in certificate chain issue

Hi Team,

I am integrating the nifi using the webhook to send the alert.
In body i just sending
{
"Name": "Rahul"
}
after setting up the credential when i run the test to check the integration i am getting below error
error calling webhook, request failed: [SELF_SIGNED_CERT_IN_CHAIN] self signed certificate in certificate chain

Kindly help me to resolve the issue.

thanks,
Sachin