Have you made any useful or fun 3D printed objects with PLA filament on the Snapmaker?

I tried printing some 3D models with PLA filament. The results were defective. How do I fix this problem as shown in the following picture?

You are referring to a picture, but there is no picture…

I’m sorry to forget upload the picture
main-i-e60130f57c427255ad966e0d329ed29a52f2290e