Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding Troubleshooting "We could not make a valid story"

Does it happen without any mods enabled? If it happens with any mod I would say it's either that you've accidentally and incorrectly altered the vanilla story scripts somewhere or maybe you've accidentally added some broken scripts loose in the folders for the base game.