On Friday 19th April 2021 at 8:30pm AEST OpenFreight and the QZ Tray application will be updated with new security certificates.
When you go to print a label from this date you will be presented with a pop-up requesting access.
Make sure you have checked "Remember this decision" and "always" when this window first pops up. Once this is done you may need to refresh the page (F5) for thermal printing to function normally again.
If you do not check "Remember this decision" then this box will popup every time you connect to OpenFreight
Further details on thermal label printing troubleshooting can be found here.