If you encounter an error that describes a "Date Time variance X > Y" it means that there is a discrepancy between the actual Date & Time and the Date & Time on your phone.
To fix this error ensure that you phones Date & Time is set to update Automatically and that the Timezone is set to Auckland, New Zealand.
Note: If the date & time ever gets out of sync you will encounter this error. The NZTA requires Logmate to ensure that the records you enter in your logbook are accurate.