I am running the GOG NWN Diamond and have discovered a bug which won't allow me to complete the prelude of the original campaign

When I talk to the NPC in the stables after the fight his chat options have a 1. continue, however pressing this just finishes the conversation.

Is there anyway around this other than saving my character and restarting at chapter 1 skipping the prelude?

Any answers appreciated

Can you post a screenshot of the room? There should be both Desther AND Fenthick there, two NPCs.

Desther and the Dryad both left during the fight.
Screenshot ATTACHED

Well then.

So, that Yuan-ti and the Intellect Devour are BOTH supposed to be gone...and Desther is supposed to be there.

I've never heard of this bug in over 12 years of playing...I think you either need an earlier save or start the Prelude over (you can knock it out in probably <15-20 minutes if you move fast). If it happens again then your game might be corrupted, try applying the Critical Rebuild to fix any broken files.

That is weird indeed. Yuan-ti and İntellect thing should have left before the battle. Are you using any mods? You can try to load an earlier save game. And Pavel should automatically talk to you after battle and leave you alone.

I am sorry I couldnt be of much help. Goodluck. NWN is an awesome game.