Why was there a " personnel crisis " at the end of Journey to the West?

In Journey to the West, the turmoil of important personnel was an important turning point in the plot of the novel, which marked the beginning of the climax of the novel. In this storm, Sun Wukong, Zhu Bajie, and Monk Sand learned that Tang Sanzang had been captured by the demon and decided to go to the rescue. During the journey, they encountered many difficulties and challenges, but in the end, they successfully rescued Tang Sanzang and brought him back to the Western Heaven to learn from the scriptures. The human crisis was an important turning point in the plot of the novel, marking the official beginning of the journey of the four masters. After this storm, they began to experience a series of adventures and challenges. They had to face all kinds of dangers and difficulties, and at the same time, they made more and more friends and enemies. It was also an important moment for the growth of the novel's character, Sun Wukong. During this period, Sun Wukong not only learned how to face difficulties and challenges, but also learned how to get along with others and gradually grew into a more mature and intelligent superhero.