Configuring CA-certificate is not working

Having issues in configuring mutual SSL using CA certificate in Postman.

Steps I did

  1. generated root certificate
  2. generated ca certificate signed using the root certificate
  3. generated server and client certificates, and signed using ca certificate
  4. deployed the server certificate in jboss and configured it in standalone.xml

I am able to test the restful api’s through java client
I am not able to test the same restful api’s through postman gui

I tried configuring the root and ca certificate in postman gui ->setting->certificates->ca certificate
it is not working.

please help.
Thank you in advance.