[Q] Korean error message during Kies update to Lollipop for UK SG-900F topic

During the firmware update process, I get this dialog (see below). I'm in the UK, on an unlocked SG-900F. Under About Device > Status > Device Status, it says Official.

Translation: If binaries are not registered, you can not proceed with the upgrade. Please check whether the binary file properties.



Fairly certain that my device is unlocked ... if anyone can explain how I can check, I will?