rl_knapsack_coach_customEnv.ipynb failed CI

Link to the notebook:
https://github.com/aws/amazon-sagemaker-examples/blob/master/reinforcement_learning/rl_knapsack_coach_custom/rl_knapsack_coach_customEnv.ipynb

Error:

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Exception encountered at "In [1]":
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ModuleNotFoundError Traceback (most recent call last)
in
10 from time import gmtime, strftime
11 sys.path.append("common")
---> 12 from misc import get_execution_role, wait_for_s3_object
13 from sagemaker.rl import RLEstimator, RLToolkit, RLFramework

ModuleNotFoundError: No module named 'misc'

Open reinforcement_learning/rl_knapsack_coach_custom/rl_knapsack_coach_customEnv.ipynb and inspect the first cell, especially sys.path.append("common") and the from misc import ... line. Run the notebook's CI validation to reproduce the ModuleNotFoundError; done means the notebook imports successfully and CI passes.

Written by the indexing model from the issue text.