For those who receive the error (MONS-021) when trying to edit a probe via admin console, simply install the PPM probe in the hub where the probe is, or in the hub where the robots are connected.
If you have many hubs and multiple servers connected to these hubs spread, you need to deploy the PPM probe in each of the HUBs.
Install PPM in your HUBs (Primary and Remote). Remember that PPM requires probes (baseline_engine, prediction_engine and monitoring_services). I suffered to install, because in each hub it requested a different version of the dependent probes.
Be prepared ...