Google colabでch08_Recipe-WaveNet.ipynbをRunしてもレシピstage 4でエラーが発生

[HiromichiMatsui]

Google colabでch08_Recipe-WaveNet.ipynbをRunしてもレシピstage 4でエラーが発生。
dump/jsut_sr16000/org/train/in_logf0/BASIC5000_0001-feats.npyが生成されません。
Traceback (most recent call last):
File "/content/recipes/wavenet/../common/fit_scaler.py", line 29, in
c = np.load(in_dir / f"{utt_id.strip()}-feats.npy")
File "/usr/local/lib/python3.9/dist-packages/numpy/lib/npyio.py", line 407, in load
fid = stack.enter_context(open(os_fspath(file), "rb"))
でFileNotFoundErrorが出ます。