It's the team aware of the issue with progressing Halsin's and Zevlor's quest at the "Defeat the Goblin leaders" step?
It seems that knocking out Minthara instead of killing her make progress impossible in either of these quests.
I submited a bug report, but I'm not sure if it is in the team's radar. I was hoping not to have to reload and lose 4 hours of playtime.