@Krishna Venkata
To access the NIFI through SSL you need to load the user certificate in your browser. Then you will be able to access the NIFI UI.
To understand the procedure to do the same. Kindly follow the link below.
https://www.batchiq.com/nifi-configuring-ssl-auth.html
If it resolve your query. Kindly accept my answer.
Hope it helps!!!!!!!!