KeyError: 'block6/c2/b is not a file in the archive'

[crazyoscarchang]

I got the following error when I tried to run the pre-trained model:
KeyError: 'block6/c2/b is not a file in the archive'

Using the following command:
python2 evaluations/gen_interpolated_images.py --n_zs=10 --n_intp=10 --classes 3 4 --config=configs/sn_projection.yml --snapshot=ResNetGenerator_250000.npz --results_dir=results/

Any idea what could be wrong?