pipeline {
  agent any
  stages {
    stage ('step 1') {
      steps {
        milestone()
        echo "hello 2"
      }
    }
    stage ('step 2') {
      steps {
        milestone()
        echo "hello 2"
      }
    }
  }
}

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
WorkflowScript: 8: Missing required parameter: "ordinal" @ line 8, column 9.
milestone()
^
WorkflowScript: 14: Missing required parameter: "ordinal" @ line 14, column 9.
milestone()