I can't take the quest. (Assassin's Creed: Valhalla)

Same. The only solution is, you have to cut out the entire order, pass the quest to Hasima, and then he will send you to a small merchant.

After completing the chain of missions in the area (wider) Kent appears the task "The impending storm." After completing this mission, Reda was active in telling the story to the children. After the story was heard, the interaction with him was restored. You can buy goods, take orders.