按照論壇上的正常步驟安裝了windowBuilder插件后，在eclipse新建WindowBuilder的時候，總是報錯：The selected wizard could not be started.Plug-in org.eclipse.wb.rcp was unable to load class org.eclipse.wb.internal.rcp.wizards.project.NewProjectWizard.An error occurred while automatically activating bundle org.eclipse.wb.core.java (590).怎么解決??？