AttributeError: module 'tensorflow' has no attribute 'placeholder'

[Nv7-GitHub]

I just cloned this repository and ran code/final_face_slider.py, and I got this error:
AttributeError: module 'tensorflow' has no attribute 'placeholder'

[DipanshuShukla]

What tensorflow version are you using? This is depended on tensorflow 1.x, this error usually occurs when using tensorflow 2.