EventSentry was unable to query the local audit policy settings. A call to open the LSA policy failed with error Access is denied.. Please see the EventSentry documentation for troubleshooting advice on this problem.
This event is usually logged when the user account the EventSentry service (agent) is running under does not have sufficient permissions to query the LSA policy.
Make sure that the "EventSentry" service is configured to run under a user account that has local administrative permissions.