Troubles with pickle.loads

I invoke with this parameters
`python demo.py -m liveness.model -l le.pickle -d D:\dev\Face-Liveness-Detection -p shapepredictor`
and get a problem which I can't solve.

![image](https://user-images.githubusercontent.com/9804340/112731153-a134b200-8f46-11eb-8789-4c1c42b2b12d.png)

Is I mistake in parameters or it is a bug?
