java.lang.ClassNotFoundException: org.eclipse.mylyn.internal.bugzilla.core.BugzillaRepositoryConnector
   at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Caused: java.lang.ClassNotFoundException: org.eclipse.mylyn.internal.bugzilla.core.BugzillaRepositoryConnector starting from ModuleCL@5b8099a[org.netbeans.modules.bugzilla] with possible defining loaders [Netigso[reference:file:Resources/NetBeans/ide/modules/org-eclipse-mylyn-bugzilla-core.jar]] and declared parents [ModuleCL@251c135c[org.openide.loaders], ModuleCL@4296e599[org.openide.windows], Netigso[reference:file:Resources/NetBeans/ide/modules/org-eclipse-mylyn-tasks-core.jar], ModuleCL@5323961b[org.netbeans.modules.autoupdate.services], ModuleCL@6063f5af[org.openide.nodes], ModuleCL@7276f1f4[org.netbeans.modules.bugtracking], Netigso[reference:file:Resources/NetBeans/ide/modules/org-eclipse-core-runtime.jar], ModuleCL@4c9d22fc[org.openide.dialogs], Netigso[reference:file:Resources/NetBeans/ide/modules/org-apache-commons-httpclient.jar], ModuleCL@7d627b8b[org.netbeans.api.progress], ...11 more]
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:264)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Caused: java.lang.NoClassDefFoundError: org/eclipse/mylyn/internal/bugzilla/core/BugzillaRepositoryConnector
   at org.netbeans.modules.bugzilla.Bugzilla.<init>(Bugzilla.java:83)
   at org.netbeans.modules.bugzilla.Bugzilla.getInstance(Bugzilla.java:97)
   at org.netbeans.modules.bugzilla.Bugzilla.init(Bugzilla.java:103)
   at org.netbeans.modules.bugzilla.BugzillaConnector.createRepository(BugzillaConnector.java:96)
   at org.netbeans.modules.bugtracking.DelegatingConnector.createRepository(DelegatingConnector.java:130)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder$NewRepositoryInfo.initializeRepository(RepositorySelectorBuilder.java:724)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder.displayRepositoryForm(RepositorySelectorBuilder.java:533)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder.itemSelected(RepositorySelectorBuilder.java:494)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder.initializeCombo(RepositorySelectorBuilder.java:283)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder.getComboBox(RepositorySelectorBuilder.java:232)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder.createPanel(RepositorySelectorBuilder.java:308)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder$ValidatingDialogDescriptor.<init>(RepositorySelectorBuilder.java:364)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelectorBuilder.createDialogDescriptor(RepositorySelectorBuilder.java:357)
   at org.netbeans.modules.bugtracking.ui.selectors.SelectorPanel.open(SelectorPanel.java:69)
   at org.netbeans.modules.bugtracking.ui.selectors.RepositorySelector.create(RepositorySelector.java:73)
   at org.netbeans.modules.bugtracking.util.BugtrackingUtil.createRepository(BugtrackingUtil.java:228)
   at org.netbeans.modules.bugtracking.util.BugtrackingUtil.createRepository(BugtrackingUtil.java:223)
   at org.netbeans.modules.bugtracking.ui.query.QueryTopComponent.onNewClick(QueryTopComponent.java:493)
   at org.netbeans.modules.bugtracking.ui.query.QueryTopComponent.access$100(QueryTopComponent.java:110)
   at org.netbeans.modules.bugtracking.ui.query.QueryTopComponent$2.actionPerformed(QueryTopComponent.java:265)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
   at java.awt.Component.processMouseEvent(Component.java:6375)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
   at java.awt.Component.processEvent(Component.java:6140)
   at java.awt.Container.processEvent(Container.java:2083)
   at java.awt.Component.dispatchEventImpl(Component.java:4737)
   at java.awt.Container.dispatchEventImpl(Container.java:2141)
   at java.awt.Component.dispatchEvent(Component.java:4565)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4619)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4280)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4210)
   at java.awt.Container.dispatchEventImpl(Container.java:2127)
   at java.awt.Window.dispatchEventImpl(Window.java:2482)
   at java.awt.Component.dispatchEvent(Component.java:4565)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:684)
   at java.awt.EventQueue.access$000(EventQueue.java:85)
   at java.awt.EventQueue$1.run(EventQueue.java:643)
   at java.awt.EventQueue$1.run(EventQueue.java:641)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
   at java.awt.EventQueue$2.run(EventQueue.java:657)
   at java.awt.EventQueue$2.run(EventQueue.java:655)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:654)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)