There are various issues in Network Monitor when enabling debug logging will provide more information about an issue, especially when there isn't a clear indication of a root cause from other logging, like Event Viewer and System Log.
On the KServer
To enable debug logging, please navigate to <Windows Drive>\Kaseya\knm, open the init.cfg file and add the following lines:
On the Gateways
To enable debug logging for the KNM gateway, the init.cfg file is located in the <Windows Drive>\[Program Files|Program Files (x86)]\Kaseya\<Agent>\knm_gateway directory on the agent machine where the gateway is installed. Add the line:
For KNM gateways on the agent machines, the debug logs will be written to <Windows Drive>\[Program Files|Program Files (x86)]\Kaseya\<Agent>\knm_gateway\logs.
The Network Monitor services do not need to be restarted and should start writing immediately.
Please note that these steps for the KServer are only applicable to On-Premise customers.