03a_builtin_preprocessing.ipynb failed CI

Link to the notebook:
https://github.com/aws/amazon-sagemaker-examples/blob/master/prep_data/image_data_guide/03a_builtin_preprocessing.ipynb

Error:

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Exception encountered at "In [2]":
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FileNotFoundError Traceback (most recent call last)
in
----> 1 with open('pickled_data/category_labels.pickle', 'rb') as f:
2 category_labels = pickle.load(f)

FileNotFoundError: [Errno 2] No such file or directory: 'pickled_data/category_labels.pickle'

Open prep_data/image_data_guide/03a_builtin_preprocessing.ipynb and inspect In [2], which opens pickled_data/category_labels.pickle. Reproduce the CI run or execute the notebook from its directory, then confirm the required file is available and the notebook completes without FileNotFoundError.

Written by the indexing model from the issue text.