Many Korean cells that have been removed form sale. These cells have been replaced by new cells that should already be in your ECDIS. Please see attached the original list of withdrawn cells, and also the latest README.TXT for more information.
Advise to delete all permits from the ECDIS, and re-install from the NavStick
If still some issue with KR-charts and updating, then send a screenshot of the error to technical@navtor.com for further investigation.