<img width="710" alt="image" src="https://github.com/ZhChen7/Student-course-selection-system/assets/119039834/ba4931f4-c11b-49da-816e-02060662f151"> <img width="692" alt="image" src="https://github.com/ZhChen7/Student-course-selection-system/assets/119039834/028d9b20-f4ec-4b60-bbce-e5cff86c66d3"> 多次点击登陆按钮都没反应，并且报了错
