HCW: could not converting string to DateTimeOffset

Hi,

running thr HCW I get this error: "Could not convert string to DateTimeOffset: 0001-01-01T00:00:00. Path '[0].LastDirSyncTime' line 1, position 104"

the log reports

2019.09.06 08:30:56.214 *ERROR* 10430 [Client=UX, ExecuteHighlandsServiceRequest=DirSync, Thread=17]
                                      Newtonsoft.Json.JsonReaderException: Could not convert string to DateTimeOffset: 0001-01-01T00:00:00. Path '[0].LastDirSyncTime', line 1, position 104.
                                         at Newtonsoft.Json.JsonReader.ReadDateTimeOffsetString(String s)

Any idea? :(

thanks