create_training_job_vpc.ipynb failed CI

Link to the notebook:
https://github.com/aws/amazon-sagemaker-examples/blob/master/sagemaker-fundamentals/create-training-job/create_training_job_vpc.ipynb

Error:

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Exception encountered at "In [3]":
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CalledProcessError Traceback (most recent

[...]

CalledProcessError: Command 'b'# build the image\ncd container/\n\n# tag it as example-image:latest\ndocker build -t example-image:latest .\n \n# test the container\npython local_test/test_container.py\n\naccount=$(aws sts get-caller-identity --query Account | sed -e \'s/^"//\' -e \'s/"$//\')\nregion=$(aws configure get region)\necr_account=${account}.dkr.ecr.${region}.amazonaws.com\n\n# Give docker your ECR login password\naws ecr get-login-password --region $region | docker login --username AWS --password-stdin $ecr_account\n\n# Fullname of the repo\nfullname=$ecr_account/example-image:latest\n\n# Tag the image with the fullname\ndocker tag example-image:latest $fullname\n\n# Push to ECR\ndocker push $fullname\n'' returned non-zero exit status 1.