[2021] Main NPCs are death and I can't complete quests

Some NPCs like Acha and Hunward are dead, and I can't "resurrect" the NPC to continue the game, I've tried to load old save games, exit game, travel to Norway and I can't restore.
I can't start the DLC "The Siege of Paris" because main NPC are dead too.

How I can reset the "life" status of these NPC? exist a patch? register entry? modify the save file?


The screenshot is "Salve for a Fresh Wound" mission, there is no objective Icon to talk with the NPC.

Thanks