After you beat the second quest the wiki says to go to the throne room to get the third quest but the throne room is empty is there a side quest I need to do first?
When you finish the second mission, you have to sleep in the castle. You will have a unique scene, a dream, and then you can go to the throne room and start the next quest.
Many of the game's events have this dynamic. Dreams, you need to sleep and see special scenes before proceeding.
