Error 403, Problem with importing image data in s3 to SageMaker Notebook

I am working with SageMaker Notebook and image data in S3 bucket with name s3://<BucketName>/train/<class0-4> and validate data in other dir.
I create an IAM Role and put previous specific bucket, in the notebook I load this bucket with:

s3_train = 's3://<BucketName>/train'
train_data = sagemaker.session.s3_input(s3_train, distribution='FullyReplicated', 
                        content_type='application/x-image', s3_data_type='S3Prefix')

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The same for train lst file, validation data and validation lst data, after create data channels with this:

data_channels = {'train': train_data, 'validation': validation_data, 
                 'train_lst': train_data_lst, 'validation_lst': validation_data_lst}

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After create a TensorFlow estimator, and finally in fit pass the data with this:

tf_estimator.fit(inputs=data_channels, logs=True)

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And return this menssage error:
An error occurred (403) when calling the HeadObject operation: Forbidden