AppCrawler version 2.1.3

运行时报错，请问怎么解决？

2018-05-11 17:01:24 INFO [Crawler.start.141] waiting for app load
2018-05-11 17:01:32 INFO [Crawler.start.143] driver=null
2018-05-11 17:01:32 INFO [Crawler.start.144] get screen info
2018-05-11 17:01:32 INFO [AppiumClient.getDeviceInfo.217] screenWidth=1920 screenHeight=1128
2018-05-11 17:01:32 INFO [Crawler.refreshPage.554] refresh page
2018-05-11 17:01:32 INFO [AppiumClient.getPageSource.308] start to get page source from appium
2018-05-11 17:01:32 INFO [AppiumClient.$anonfun$getPageSource$1.321] xml format
Exception in thread "main" java.lang.NoSuchMethodError: com.sun.org.apache.xml.internal.serialize.OutputFormat.(Lorg/w3c/dom/Document;) V
at com.testerhome.appcrawler.XPathUtil$.toPrettyXML(XPathUtil.scala:35)
at com.testerhome.appcrawler.driver.AppiumClient.$anonfun$getPageSource$1(AppiumClient.scala:336)
at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:156)
at com.testerhome.appcrawler.driver.AppiumClient.getPageSource(AppiumClient.scala:310)
at com.testerhome.appcrawler.Crawler.refreshPage(Crawler.scala:555)
at com.testerhome.appcrawler.Crawler.start(Crawler.scala:146)
at com.testerhome.appcrawler.AppCrawler$.startCrawl(AppCrawler.scala:344)
at com.testerhome.appcrawler.AppCrawler$.parseParams(AppCrawler.scala:312)
at com.testerhome.appcrawler.AppCrawler$.main(AppCrawler.scala:92)
at com.testerhome.appcrawler.AppCrawler.main(AppCrawler.scala)