Has anyone ever experienced the following error when using tensorflow?

tensorflow.python.framework.errors_impl.InternalError: : No response body. Response code: 404

I am puzzled as I've looked everywhere and haven't found anything... Seems like nobody has ever experienced this error. But I have no idea where it's coming from, it's really frustrating since the error message is so cryptic...

I am trying to run a Kubeflow tutorial from : https://github.com/kubeflow/examples/tree/master/mnist where I setup S3 with Kubernetes according to the instructions. But cant' get passed this error. The job gets posted and the pods get created, but they fail when the model training starts. The error seems to happen at the following line:

tf.estimator.train_and_evaluate(classifier, train_spec, eval_spec)

I would really appreciate if anyone could give me a little hint on this one :)