WEM Security Executable Rules are not working as expected

AppLocker policies configured through Citrix Workspace Environment Management WEM under Security - Executable Rules are not working as expected...

Some Workspace Environment Management security settings are not getting applied

Some WEM-related security settings such as hiding the Run menu or blocking access to system drives are not being applied, and the Agent log throws errors such as these: Exception - VuemEnvironmentalSettingsController.ExecuteEntityPolicySettings : Attempted to perform an unauthorized operation...