Detective Nick Valentine. Dialogue does not work. (Fallout 4)

All the best!
Such a misfortune happened. After rescuing Valentine from the clutches of gangsters. Upon arrival at his office in diamond city, the dialogue does not work. He just babbles nonsense about lights and shadows. There is a similar problem with a bum on the marketplace who needs to bring cola kernels. Presumably: what could have interfered with the game. First, when you first complete this quest. I didn’t take Valentine to town. Upon arrival at his office by fast travel. His corpse lay there. Then I went over the quest and brought it "almost" to the city myself. On the way to the city, he interceded in one place with speeches about architecture and a possible ambush. In the same spot near the river with the overturned van, where the deal between ghoul gangsters and an African American drag dealer from diamond city will take place. The quest is given by the bartender from the upper bar. In general, Valentine stood among the corpses of gangsters and did not go anywhere further. I went to the city by fast travel. He was waiting for me at the office. but the Dialogue and the new quest to find the son never started. In the launcher, I disabled the function of killing NPCs like children and quest NPCs. Disabling this parameter helped to give the bum a Nuka Coke. But Valentine is still playing silent. Upon exiting Vault 114 to the surface. He does not want to discuss these matters and says that it is better to rest and meet in the city. Maybe you just need to wait a while? or the game has interfered with the launcher function. Or on the spot with those corpses. In general, who came across. Help. Can reset it with the console. or dance with a tambourine. (PS. I have no experience with the console in any part of this engine. Since Oblivion.) PSS. there was a similar problem at the very beginning of the game. When clearing a city in Power Armor. There, the story character also died. Re-passing helped. It didn't help ...