Dragon’s Crown Pro has been updated to version 1.03 today by Vanillaware. You can get the complete patch notes for this update from here.
This hotfix has been deployed after several years and appears to relate to online activation. There were certain conditions where the online activation was not working as intended so this hotfix was needed to resolve it. This patch is only for the Japanese version of the game as there doesn’t appear to be any update for other regions.
Dragon’s Crown Pro Update 1.03 Patch Notes
- Fixed a bug that prevented online activation under certain conditions.
Here’s some information on the game.