I ran into a game breaking bug with the latest updated version of the nwn2 original campaign game, v1.023.1765.
Spoiler:It involves Ammon Jerro not leaving the crossroads keep to go to shandra's farm after lord Nasher gets wounded while trying to push back the king of shadows from high cliff. Also, when I tried to tell lord Nevalle to ignore Ammon and skip to the seige fight but Nevalle kept on saying go ask someone in the keep and the sage Aldernon and Bishop never triggered their cut scene and Ammon was in the basement of the keep and wouldn't leave, even though Narvalle said that Ammon had left.
So, I finally solved this game breaking problem after a long and very hard search through a lot of sites and came up with this using the command console:
DebugMode 1
rs ga_roster_selectable("ammon", 0)
rs ga_roster_compaignnpc("ammon", 0)
DebugMode 0
This should remove Ammon from being choice for party selection, which will trigger the Find Ammon Jerro at the farm quest correctly.
I hope this anyone else who also happens to come across this damn bug.