Why does the webpage report an error, but the back-end log seems to be still working

Why does the webpage report an error, but the back-end log seems to be still work
Front end information:
<img width="468" height="307" alt="Image" src="https://github.com/user-attachments/assets/3836c533-5daa-469b-bd35-e57a537c06ea" />
Back end information:
<img width="2058" height="200" alt="Image" src="https://github.com/user-attachments/assets/6c94ff5b-bc97-486a-9f7f-fd70cf9d2bbb" />