Your notebook worked!

I only needed to change this cell:

package org.apache.spark.util

import org.apache.spark.scheduler.SparkListenerEvent
import org.json4s.JsonAST.JValue
import org.json4s.jackson.JsonMethods

/**
 * Visibility hack.
 */
object PublicJsonProtocol  {
  def sparkEventFromJson(json: JValue): SparkListenerEvent = {
    JsonProtocol.sparkEventFromJson(JsonMethods.compact(json))
  }
}

Spark UI output of an job compute (executed yesterday):

you made my day 🤗