unfortunately, same error.
Emailed the cluster config json files to our SA, whom you are working with. 
the difference is:
works:
"data_security_mode": "NONE",
"spark_conf": {
"spark.master": "local[*, 4]",
"spark.databricks.cluster.profile": "singleNode"
},

doesn't work:
"spark_conf": {}
"data_security_mode": "USER_ISOLATION"