The java.security.PrivilegedActionException error is very generic and happens due to different reasons. In order to know the specific root cause for the error, I would check the **vdp.log** file found under the **''<DENODO_HOME>\logs\vdp''** folder which contains the **LDAP error code**.
**For instance:** If the error shows **data code is 0** then the problem might be due to the incorrect Distinguished Name(DN). In that case, I would reconfigure the Distinguished Name such that the LDAP user is located properly.
You can have a look at [LDAP authentication best practices](https://community.denodo.com/kb/view/document/LDAP%20authentication%20best%20practices?category=Security) Knowlegde Base Article for more information.
Hope this helps!