Issue with SynapseSparkStep in an AML pipeline to orchestrate data prep step

https://github.com/Azure/MachineLearningNotebooks/blob/master/how-to-use-azureml/azure-synapse/spark_job_on_synapse_spark_pool.ipynb

I am following this document, and was able to run end to end a few weeks ago. However, it is suddenly not working when to save the output file to the HDFSOutputDatasetConfig file. My microsoft alias is klei@microsoft.com, can you please help ping me to resolve this issue?