This is a defect in monitoring_services 1.60 which will be hotfixed as soon as possible.
In the meantime, downgrading back to monitoring_services 1.50 will resolve the issue.? If this is not available in your NMS Archive, you may download it from the following location and then import it:
NOTE: monitoring_services does not show up as a probe in the probe listing on a robot.??? To find out what version is currently installed, open the "controller" probe GUI on the primary hub robot in Infrastructure Manager.? Navigate to the "status" tab and click "Installed Packages".? Scroll down and find monitoring_services and expand the tree to locate the currently installed version.