Hi Jyoti,
please check role SAP_CFX_USER in TA PFCG. Check the status of table 'Authorization', it should be green. If it is e.g. yellow then this means that the current version is not generated and this in turn can lead to authorization problems. In this case, please generate the authoization profile in PFCG so that the status turns to green. Also, make sure that the user appears in tab 'User' (via User comparison).
Regards,
Silvia