Savegame inaccessible: requires DLC Treasures of the past (PS4)

WTF? Been playing for months, hundreds of hours in - and suddenly can’t play anymore! Says savegame requires DLC Treasures of the past.

I’ve entered the code that came with the game in the redeem codes section of PS store, gone back to start up the game again, and on load / continue screen, both of those options are still greyed out.

Any ideas what can be done here?

Please send a bugreport to:
support@kingdomcomerpg.com

Thank you!!!