Not able to retrieve data from Security - Roles and Privileges Real Time subject area.

We are not able to retrieve data from Security - Roles and Privileges Real Time subject area. We are trying to fetch columns from the folder Function Security Policy, Data security policy, and Roles.
The attributes are:

Role: Role Name, Role Code
Function Security Policy: Privilege Name
Data Security Policy: Policy Name, Policy Description, Database Source

However, we are unable to retrieve this data successfully. Kindly advise.

Thank you,

Swati