java.lang.ClassNotFoundException: org.netbeans.updater.UpdateTracking
   at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:366)
   at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
Caused: java.lang.ClassNotFoundException: org.netbeans.updater.UpdateTracking starting from ModuleCL@34f59db6[org.netbeans.modules.autoupdate.services] with possible defining loaders [ModuleCL@34f59db6[org.netbeans.modules.autoupdate.services]] and declared parents [org.netbeans.MainImpl$BootClassLoader@51e2adc7, ModuleCL@4fe25045[org.netbeans.api.progress.nb], ModuleCL@34a5e06c[org.netbeans.api.progress]]
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:224)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
Caused: java.lang.NoClassDefFoundError: org/netbeans/updater/UpdateTracking
   at org.netbeans.modules.autoupdate.services.ModuleUpdateElementImpl.findInstallationCluster(ModuleUpdateElementImpl.java:303)
   at org.netbeans.modules.autoupdate.services.ModuleUpdateElementImpl.getInstallationCluster(ModuleUpdateElementImpl.java:288)
   at org.netbeans.modules.autoupdate.services.UpdateManagerImpl$Cache.createMaps(UpdateManagerImpl.java:346)
   at org.netbeans.modules.autoupdate.services.UpdateManagerImpl$Cache.createMapToken2InstalledProviders(UpdateManagerImpl.java:289)
   at org.netbeans.modules.autoupdate.services.UpdateManagerImpl.getInstalledProviders(UpdateManagerImpl.java:130)
   at org.netbeans.modules.autoupdate.services.DependencyAggregator.getRequested(DependencyAggregator.java:118)
   at org.netbeans.modules.autoupdate.services.Utilities.handleDependency(Utilities.java:929)
   at org.netbeans.modules.autoupdate.services.Utilities.processDependencies(Utilities.java:830)
   at org.netbeans.modules.autoupdate.services.Utilities.findRequiredUpdateElements(Utilities.java:638)
   at org.netbeans.modules.autoupdate.services.OperationValidator$InstallValidator.getRequiredElementsImpl(OperationValidator.java:213)
   at org.netbeans.modules.autoupdate.services.OperationValidator.getRequiredElements(OperationValidator.java:121)
   at org.netbeans.modules.autoupdate.services.OperationValidator.getBrokenDependencies(OperationValidator.java:171)
   at org.netbeans.modules.autoupdate.services.OperationContainerImpl$OperationInfoImpl.getBrokenDependencies(OperationContainerImpl.java:486)
   at org.netbeans.api.autoupdate.OperationContainer$OperationInfo.getBrokenDependencies(OperationContainer.java:402)
   at org.netbeans.modules.autoupdate.pluginimporter.PluginImporter.inspect(PluginImporter.java:184)
   at org.netbeans.modules.autoupdate.pluginimporter.PluginImporter.getBrokenPlugins(PluginImporter.java:218)
   at org.netbeans.modules.autoupdate.pluginimporter.Installer$2.run(Installer.java:166)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NoClassDefFoundError: org/netbeans/updater/UpdateTracking
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:431)
   at org.netbeans.modules.autoupdate.pluginimporter.Installer$1.run(Installer.java:96)
   at org.netbeans.core.windows.WindowManagerImpl$Exclusive$1.run(WindowManagerImpl.java:1563)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:759)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:712)
   at java.awt.EventQueue$3.run(EventQueue.java:706)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:77)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:729)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)