Weka Scoring插件无法加载模型

Question

我已经安装了kettle 5.4（这是我可以运行的唯一版本），并且我的项目需要weka评分插件。我已经从市场上安装了它，但是当我要加载模型时，当按下打开按钮时，它会向我显示此错误：

java.lang.NoSuchMethodError: org.pentaho.di.core.vfs.KettleVFS.getFileObject(Ljava/lang/String;)Lorg/apache/commons/vfs2/FileObject;
    at org.pentaho.di.scoring.WekaScoringDialog$11.widgetSelected(WekaScoringDialog.java:730)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
    at org.pentaho.di.scoring.WekaScoringDialog.open(WekaScoringDialog.java:821)
    at org.pentaho.di.ui.spoon.delegates.SpoonStepsDelegate.editStep(SpoonStepsDelegate.java:124)
    at org.pentaho.di.ui.spoon.Spoon.editStep(Spoon.java:8712)
    at org.pentaho.di.ui.spoon.trans.TransGraph.editStep(TransGraph.java:3061)
    at org.pentaho.di.ui.spoon.trans.TransGraph.mouseDoubleClick(TransGraph.java:747)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
    at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1319)
    at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7939)
    at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9190)
    at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:654)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)

我尝试用下载的其他.zip文件替换默认目录，但是在那种情况下，不会出现pdi上的weka评分步骤。

谢谢。