You are not missing anything other than getting to kill the troll. That cutscene is the final result of getting the seekers sent on a punitive mission, either in the Black Boar inn, or latter if you rat them out after they tell you about Louis' secret stash (which they only do if you don't get them punished in the inn).
Did you install the patch before you started the game? Digital download versions should already be updated, though. There was a bug where certain NPCs could be missing (though it generally happened with enemy NPCs involved in cutscene conversations), which should be prevented by the patch, but not fixed if it has already occurred in the save.
You can try emailing support@larian.com about this, with a description of the problem and maybe a link to this topic, but they are currently on vacation and will not be back to work until next week. See the appropriate support page for
DKS or
FoV.
Welcome to the forum.
