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Downloading the last Elcipse (version=4.21.0) Then I insatlled aspectJ frm market place (1.9.6.202202111622). I keep see this message in log, and nothing works, I can not even see my project files ```` java.lang.NoClassDefFoundError: org/eclipse/jdt/core/IElementChangedListener at org.eclipse.jst.ws.jaxws.dom.runtime.persistence.Jee5WsDomRuntimeExtension.createResource(Jee5WsDomRuntimeExtension.java:114) at org.eclipse.jst.ws.jaxws.dom.runtime.persistence.Jee5WsDomRuntimeExtension.performLoad(Jee5WsDomRuntimeExtension.java:55) at org.eclipse.jst.ws.jaxws.dom.runtime.persistence.Jee5WsDomRuntimeExtension.createDOM(Jee5WsDomRuntimeExtension.java:46) at org.eclipse.jst.ws.jaxws.dom.runtime.persistence.load.WsDomObtainer$LoadDomRunnable.performLoad(WsDomObtainer.java:118) at org.eclipse.jst.ws.jaxws.dom.runtime.persistence.load.WsDomObtainer$LoadDomRunnable.run(WsDomObtainer.java:102) at org.eclipse.jst.ws.jaxws.utils.operation.OperationInJobRunner$1.run(OperationInJobRunner.java:62) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.lang.ClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.jdt.core (407). at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:126) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:570) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:384) at org.eclipse.osgi.internal.loader.sources.SingleSourcePackage.loadClass(SingleSourcePackage.java:41) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:471) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:403) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at java.base/java.lang.Class.getDeclaredConstructors0(Native Method) at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3373) at java.base/java.lang.Class.getConstructor0(Class.java:3578) at java.base/java.lang.Class.getConstructor(Class.java:2271) at org.eclipse.osgi.internal.framework.BundleContextImpl.loadBundleActivator(BundleContextImpl.java:793) at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:745) at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1019) at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:365) at org.eclipse.osgi.container.Module.doStart(Module.java:605) at org.eclipse.osgi.container.Module.start(Module.java:468) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:404) at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:570) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:384) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:475) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:403) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:616) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:196) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:920) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:246) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:63) at org.eclipse.ui.internal.navigator.filters.CommonFilterDescriptor$1.run(CommonFilterDescriptor.java:141) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.ui.internal.navigator.filters.CommonFilterDescriptor.createFilter(CommonFilterDescriptor.java:121) at org.eclipse.ui.internal.navigator.NavigatorFilterService.getViewerFilter(NavigatorFilterService.java:197) at org.eclipse.ui.internal.navigator.NavigatorFilterService.getVisibleFilters(NavigatorFilterService.java:166) at org.eclipse.ui.navigator.CommonNavigator.createPartControl(CommonNavigator.java:194) at org.eclipse.ui.navigator.resources.ProjectExplorer.createPartControl(ProjectExplorer.java:161) at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:158) at org.eclipse.ui.internal.e4.compatibility.CompatibilityView.createPartControl(CompatibilityView.java:155) at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:365) 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.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58) at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:995) at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:960) at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:140) at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:403) at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:330) at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:202) at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:91) at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:60) at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:42) at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:132) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:994) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:658) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$1.run(PartRenderingEngine.java:543) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:527) at org.eclipse.e4.ui.workbench.renderers.swt.ElementReferenceRenderer.createWidget(ElementReferenceRenderer.java:73) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:994) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:658) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:727) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:711) at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.showTab(StackRenderer.java:1209) at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.postProcess(LazyStackRenderer.java:116) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:676) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:727) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:711) at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:72) at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:150) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:672) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:727) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:711) at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:72) at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveRenderer.processContents(PerspectiveRenderer.java:51) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:672) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:727) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:711) at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.showTab(PerspectiveStackRenderer.java:82) at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.postProcess(LazyStackRenderer.java:116) at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.postProcess(PerspectiveStackRenderer.java:64) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:676) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:727) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:711) at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:72) at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:150) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:672) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:727) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:711) at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:72) at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer.processContents(WBWRenderer.java:658) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:672) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:727) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:711) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1082) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1045) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) Caused by: org.osgi.framework.BundleException: Exception in org.eclipse.jdt.core.JavaCore.start() of bundle org.eclipse.jdt.core. at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:828) at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:759) at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1019) at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:365) at org.eclipse.osgi.container.Module.doStart(Module.java:605) at org.eclipse.osgi.container.Module.start(Module.java:468) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:404) at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117) ... 133 more Caused by: java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/core/JavaModelManager$AjcClosure1 at org.eclipse.jdt.core.JavaCore.start(JavaCore.java:6439) at org.eclipse.osgi.internal.framework.BundleContextImpl.lambda$2(BundleContextImpl.java:808) at java.base/java.security.AccessController.doPrivileged(AccessController.java:569) at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:802) ... 140 more Caused by: java.lang.ClassNotFoundException: org.eclipse.jdt.internal.core.JavaModelManager$AjcClosure1 cannot be found by org.eclipse.jdt.core_3.28.0.v20211117-1416 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:516) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:511) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:403) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ... 144 more ```