I started OpenScript and.. image and stack trace are more decriptive... Does anybody know what is the reason of this error?

- eclipse.buildId=unknown
- java.version=1.7.0_71
- java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_GB
Command-line arguments: -os win32 -ws win32 -arch x86
Error
Tue Aug 22 08:25:50 CEST 2017
Plug-in oracle.oats.scripting.modules.jet was unable to load class oracle.oats.scripting.modules.jet.views.objectDetails.JETViewWebHierarchy.
- java.lang.ClassNotFoundException: oracle.oats.scripting.modules.jet.views.objectDetails.JETViewWebHierarchy
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:483)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:399)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:387)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:87)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:315)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1274)
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:160)
at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:867)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)
at org.eclipse.ui.internal.handlers.HandlerProxy.loadHandler(HandlerProxy.java:335)
at org.eclipse.ui.internal.handlers.HandlerProxy.isEnabled(HandlerProxy.java:304)
at org.eclipse.core.commands.Command.isEnabled(Command.java:833)
at org.eclipse.core.commands.Command.setHandler(Command.java:965)
at org.eclipse.ui.internal.handlers.HandlerAuthority.updateCommand(HandlerAuthority.java:457)
at org.eclipse.ui.internal.handlers.HandlerAuthority.deactivateHandler(HandlerAuthority.java:312)
at org.eclipse.ui.internal.handlers.HandlerService.deactivateHandler(HandlerService.java:148)
at org.eclipse.ui.internal.handlers.HandlerService.deactivateHandlers(HandlerService.java:157)
at org.eclipse.ui.internal.handlers.HandlerPersistence.clearActivations(HandlerPersistence.java:103)
at org.eclipse.ui.internal.handlers.HandlerPersistence.dispose(HandlerPersistence.java:116)
at org.eclipse.ui.internal.handlers.HandlerService.dispose(HandlerService.java:163)
at org.eclipse.ui.internal.services.ServiceLocator.dispose(ServiceLocator.java:142)
at org.eclipse.ui.internal.Workbench.shutdown(Workbench.java:2726)
at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:921)
at org.eclipse.ui.internal.Workbench.access$15(Workbench.java:838)
at org.eclipse.ui.internal.Workbench$23.run(Workbench.java:1082)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.Workbench.close(Workbench.java:1080)
at org.eclipse.ui.internal.Workbench.close(Workbench.java:1052)
at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:719)
at org.eclipse.ui.internal.WorkbenchWindow.access$0(WorkbenchWindow.java:698)
at org.eclipse.ui.internal.WorkbenchWindow$3.run(WorkbenchWindow.java:814)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:812)
at org.eclipse.jface.window.Window.handleShellCloseEvent(Window.java:741)
at org.eclipse.jface.window.Window$3.shellClosed(Window.java:687)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:92)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
at org.eclipse.swt.widgets.Decorations.closeWidget(Decorations.java:307)
at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1643)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3789)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:337)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1576)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:1937)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4528)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2366)
at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:477)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3877)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:337)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1576)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:1937)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4528)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2371)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3420)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
at org.eclipse.equinox.launcher.Main.main(Main.java:1212)