ls was unable to load class org.springframework.tooling.ls.eclipse.commons.YamlGenericEditor.

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Plug-in org.springframework.tooling.boot.ls was unable to load class org.springframework.tooling.ls.eclipse.commons.YamlGenericEditor.

org.eclipse.core.runtime.CoreException: Plug-in org.springframework.tooling.boot.ls was unable to load class org.springframework.tooling.ls.eclipse.commons.YamlGenericEditor.
	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:200)
	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:182)
	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:934)
	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.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:284)
	at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:235)
	at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:332)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPart(CompatibilityPart.java:305)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPart(CompatibilityEditor.java:66)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:343)
	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.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
	at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:1001)
	at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:966)
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:139)
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:411)
	at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:333)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:193)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:108)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:77)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:59)
	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:1015)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:675)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:781)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:752)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:746)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:730)
	at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.showTab(StackRenderer.java:1296)
	at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.lambda$0(LazyStackRenderer.java:75)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:147)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4594)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:215)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
	at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:204)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:199)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:233)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
	at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:138)
	at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:81)
	at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:42)
	at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
	at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
	at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
	at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:177)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:637)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:601)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:791)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:404)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1241)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3298)
	at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3197)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3194)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3158)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3148)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:566)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:521)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:363)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:170)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:287)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:252)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:252)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:382)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:545)
	at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:49)
	at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:853)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:850)
	at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1165)
	at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:276)
	at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:271)
	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:311)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4145)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1055)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3958)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3561)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:628)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:563)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:151)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:199)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:391)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:246)
	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.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:595)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1501)
Caused by: java.lang.ClassNotFoundException: An error occurred while automatically activating bundle org.springframework.tooling.ls.eclipse.commons (539).
	at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:126)
	at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:557)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:331)
	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:473)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:414)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:153)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.springframework.tooling.boot.ls.DelegatingStreamConnectionProvider.(DelegatingStreamConnectionProvider.java:62)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at java.lang.Class.newInstance(Class.java:442)
	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:190)
	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:934)
	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.lsp4e.LanguageServersRegistry$ExtensionLanguageServerDefinition.createConnectionProvider(LanguageServersRegistry.java:114)
	at org.eclipse.lsp4e.LanguageServerWrapper.start(LanguageServerWrapper.java:196)
	at org.eclipse.lsp4e.LanguageServiceAccessor.getLSWrapperForConnection(LanguageServiceAccessor.java:340)
	at org.eclipse.lsp4e.LanguageServiceAccessor.getLSWrappers(LanguageServiceAccessor.java:299)
	at org.eclipse.lsp4e.LanguageServiceAccessor.getLSPDocumentInfosFor(LanguageServiceAccessor.java:444)
	at org.eclipse.lsp4e.ConnectDocumentToLanguageServerSetupParticipant$1.run(ConnectDocumentToLanguageServerSetupParticipant.java:75)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.osgi.framework.BundleException: Exception in org.springframework.tooling.ls.eclipse.commons.LanguageServerCommonsActivator.start() of bundle org.springframework.tooling.ls.eclipse.commons.
	at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:803)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:732)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1005)
	at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:357)
	at org.eclipse.osgi.container.Module.doStart(Module.java:584)
	at org.eclipse.osgi.container.Module.start(Module.java:452)
	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:471)
	at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117)
	... 25 more
Caused by: org.eclipse.swt.SWTException: Invalid thread access
	at org.eclipse.swt.SWT.error(SWT.java:4595)
	at org.eclipse.swt.SWT.error(SWT.java:4510)
	at org.eclipse.swt.SWT.error(SWT.java:4481)
	at org.eclipse.swt.widgets.Display.error(Display.java:1185)
	at org.eclipse.swt.widgets.Display.checkDevice(Display.java:737)
	at org.eclipse.swt.widgets.Display.disposeExec(Display.java:1130)
	at org.eclipse.jface.resource.ColorRegistry.hookDisplayDispose(ColorRegistry.java:259)
	at org.eclipse.jface.resource.ColorRegistry.(ColorRegistry.java:122)
	at org.springframework.tooling.ls.eclipse.commons.LanguageServerCommonsActivator.start(LanguageServerCommonsActivator.java:93)
	at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:782)
	at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:775)
	... 32 more

解決方法:
eclipseを再起動するだけで、コンピュータを再起動してからeclipseを再起動することができなければ、eclipseを起動してもだめであれば、再起動して、他のプロファイルを削除しないでください.そうしないと、ワークスペースは使用できません.