Hi Tushar
Please enable SSL Debug in workstation and share the SSL Handshake to diagnose what may be causing the problem.
As someone has already mentioned, DevTest does not validate the SSL Server certificate of your end point. Having said that, in case if your SSL server is configured to seek a client certificate, DevTest would return the certificate pointed by the following property:
ssl.client.cert.path
You may find this property defined in local.properties or site.properties or lisa.properties.You may try commenting out this property and check if you are able to hit the endpoint.
If the result is still the same, please share SSL Debug logs from workstation.