To start Seign's DLC, it's supposed to be an exclamation mark in Seign's room after a certain mission (i don't name to avoid spoil). After this mission, i had the popup for Marisa and Markus DLCs, and their exclamation marks are here, but nothing for Seign, popup or exclamation mark.

I have defeated the final boss, seen credits and still nothing. I tried to uninstall / reinstall the game, check files, check if Dlc is installed (via season pass in my case).

Did I missed something or anyone got a solution ?

Thanks