In The Incomplete Stable quest, you have to help Karson fix the roof of his stable in Zelda: Tears of the Kingdom.
Tears of Kingdom features many side quests including Incomplete Stable in which players will help NPC do several tasks.
Here, you will help NPC Karson mend the roof of the stable in Lookout Landing. Completing this side quest will unlock and use the mini stable in the region where you can board, register and bring out horses.
To start the Incomplete Stable side quest, make your way to the Hyrule Field in Lookout Landing in Tears of the Kingdom.
After getting there, you need to find and talk to the Karson. He will be located on the south side of the Lookout Landing near the main gate.
