java.lang.NullPointerException
	at org.jenkinsci.plugins.xvfb.Xvfb.setUp(Xvfb.java:680)
	at org.jenkinsci.plugins.workflow.steps.CoreWrapperStep$Execution2.doStart(CoreWrapperStep.java:146)
	at org.jenkinsci.plugins.workflow.steps.GeneralNonBlockingStepExecution.lambda$run$0(GeneralNonBlockingStepExecution.java:77)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE 

pipeline {
    agent any    stages {
        stage('Test') {
            steps {
                wrap([$class: 'Xvfb', additionalOptions: '', assignedLabels: 'linux',
                  autoDisplayName: true, displayNameOffset: 0, installationName: 'default-Xvfb', 
                  screen: '1024x768x24']) {
                    sh 'xterm'
                }
            }
        }
    }
}