Broken validation; due to javascript error

https://github.com/awslabs/amazon-sagemaker-examples/blob/5f187521b83a2aed1842b1a550afba90a08295a6/sagemaker_neo_compilation_jobs/mxnet_mnist/input.html#L48

when trying to run the validation by drawing on the canvas observed the following error in chrome debug console
Uncaught ReferenceError: IPython is not defined
at set_value (:48:22)
at HTMLCanvasElement. (:22:29

Note: I am using sagemaker studio to run this example

This issue looks similar to the one describes @ https://github.com/jupyterlab/jupyterlab/issues/5888#issue-400974855

Open sagemaker_neo_compilation_jobs/mxnet_mnist/input.html at line 48 and inspect set_value, then reproduce the canvas validation in SageMaker Studio while watching the Chrome console. Compare the browser environment with the linked JupyterLab issue. Done means drawing on the canvas completes validation without an “IPython is not defined” error.

Written by the indexing model from the issue text.