Hi Reddy,
I came across a similar issue. Our issue was that the connector was pointing to the wrong LDAP path.
Maybe you can ask the Basis to check the LDAP settings or other connectors which your GRC is connecting to for the master data and etc.
I find it difficult to attach the screenshots sent from my Basis person.
if you want the screenshot, please send me your email to yim_jon@hotmail.com.
I will be glad to share with you the doc.