Overlay Lotus image on face

Overlay Lotus image on face

I overlayed lotus on my face.

It recognizes my face in real time and overlay and matches the lotus on my face automatically.

I don't know why but suddenly it stopped..

I applied to the recorded video and it still stopped.

I don't know why but it still does not work and occurs error.

I just resized the lotus and tested.
I need to fix some codes.