u/Ghenkl

I have played hide and seek with Oliver, I defended the portal. I went to speak with Oliver and fight has started. I killed the shadows. When olivers nightdome was 10
Hp, i made the last attack to it and oliver become an enemy and i killed him too. Now i cannot find oliver anywhere. Halsin says he cannot because he is part of thaniel but he is not his house or anywhere else. This is honor mode so going back to an old save file is not an option. Is the quest broken or Can i fix it ?