Distributed Rendering - Date, time & Regional settings are preventing DRP's to start up.

After a couple of PC's got upgraded to the Windows 10 April (1803) update, the DRP's wouldn't start anymore on some systems.

After spending quite some time investigating this issue I expected this to be caused by the upgrade and/or User access rights.
However, as it turned out the issue was caused by the Date, time & Regional settings on the upgraded systems.

Here's a snipped of the DistributedProcessing.log
2018-05-30 15:30:49,116 [JobThread] ERROR DistributedProcessing.Controller [(null)] - Processor license is not configured.
2018-05-30 15:31:09,709 [JobMessagePollingThread] ERROR DistributedProcessing.Core [(null)]
 - Failed to process messages: System.FormatException: String was not recognized as a valid DateTime.
   at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
   at Bentley.DistributedProcessing.JobMessage.ReadMessage(String filePath, String machineId)
   at Bentley.DistributedProcessing.JobListener.HandleJobMessage(String filePath)
   at Bentley.DistributedProcessing.JobListener.MessageThreadRun()
......
This message is repeated many times...
After making the Date, time & Regional settings on all systems the same the problem seems to be resolved.
All systems participate in the DR rendering process.
However, although all works as expected, there's still a reported error in the DistributedProcessing.log files;
2018-05-30 18:28:51,834 [JobThread] ERROR DistributedProcessing.Controller [(null)] - Processor license is not configured.
All systems are using V8i SS3 (08.11.09.459)
My Questions:
1 What is the expected Date/time format ?
2 What does the ERROR msg "Processor license is not configured" actually mean ?
Looks like it can be simply ignored as all it working as expected.
Pierre