RuntimeError: Unknown image file format: Unable to load image in file input/.ipynb_checkpoints

[cvpfus]

Im running on google colab, but I got this error. Why?

Traceback (most recent call last):
File "align_face.py", line 38, in
faces = align_face(str(im),predictor)
File "/content/sample_data/pulse/shape_predictor.py", line 55, in align_face
lms = get_landmark(filepath,predictor)
File "/content/sample_data/pulse/shape_predictor.py", line 38, in get_landmark
img = dlib.load_rgb_image(filepath)
RuntimeError: Unknown image file format: Unable to load image in file input/.ipynb_checkpoints