Github user yywwd commented on the issue:
https://github.com/apache/zeppelin/pull/2231
@zjffdu NoSuchMethodError: org.apache.spark.ui.SparkUI.appUIAddress()
My AWS cluster is EMR-5.14.0, Application: Ganglia 3.7.2, Spark 2.3.0,
Zeppelin 0.7.3, Livy 0.4.0---
