Hi Ranjit
Have you worked your way through the PFCG help notes for NWBC PFCG to confirm you have completed all steps?
Was your RFC connection and ABAP or HTTP? NWBC needs HTTP or HTTPs.
I'm also paging the security space as this is not specific to GRC but entirely related to PFCG role build. You might get better response here
Regards
Colleen