java.lang.NoClassDefFoundError: org/eclipse/ui/views/navigator/ResourceNavigator	at de.anbos.eclipse.easyshell.plugin.commands.DefineCommands.createContributionItems(DefineCommands.java:51)	at org.eclipse.ui.internal.menus.ContributionFactoryGenerator.compute(ContributionFactoryGenerator.java:74)	at org.eclipse.e4.ui.workbench.renderers.swt.ContributionRecord.mergeFactoryIntoModel(ContributionRecord.java:272)	at org.eclipse.e4.ui.workbench.renderers.swt.ContributionRecord.mergeIntoModel(ContributionRecord.java:216)	at org.eclipse.e4.ui.workbench.renderers.swt.MenuManagerRenderer.processAddition(MenuManagerRenderer.java:551)	at org.eclipse.e4.ui.workbench.renderers.swt.MenuManagerRenderer.generateContributions(MenuManagerRenderer.java:531)	at org.eclipse.e4.ui.workbench.renderers.swt.MenuManagerRenderer.processContributions(MenuManagerRenderer.java:499)	at org.eclipse.ui.internal.PopupMenuExtender.addMenuContributions(PopupMenuExtender.java:380)	at org.eclipse.ui.internal.PopupMenuExtender.menuAboutToShow(PopupMenuExtender.java:355)	at org.eclipse.jface.action.MenuManager.fireAboutToShow(MenuManager.java:338)	at org.eclipse.jface.action.MenuManager.handleAboutToShow(MenuManager.java:468)	at org.eclipse.jface.action.MenuManager$2.menuShown(MenuManager.java:495)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:259)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4274)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1090)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1071)	at org.eclipse.swt.widgets.Control.WM_INITMENUPOPUP(Control.java:5140)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4772)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1478)	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2306)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5040)	at org.eclipse.swt.internal.win32.OS.TrackPopupMenu(Native Method)	at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:237)	at org.eclipse.swt.widgets.Display.runPopups(Display.java:4113)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3654)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:643)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:550)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:171)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.base/java.lang.reflect.Method.invoke(Method.java:568)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)	at org.eclipse.equinox.launcher.Main.run(Main.java:1467) Caused by: java.lang.ClassNotFoundException: org.eclipse.ui.views.navigator.ResourceNavigator cannot be found by de.anbos.eclipse.easyshell.plugin_2.2.1.v20210716-0745	... 49 more