I hope they fix all the quest bugs in the next patch. In chapter 4 there are multiple broken quests that can not be completed or progressed.
Also there are 4-5 quests locked behind the scholar tag, that my group is missing (Custom + Ifan + Lohse + Beast) ... I hope they add alternate ways for completing them.
There's even one quest which - for the best ending - requires someone in the group have Pet Pal, and someone in the group to be Fane or a custom with Scholar + Mystic. Having either Scholar or Mystic on separate people doesn't work.
Unless you have outside knowledge. If you "cheat", then you can still solve it.