java.lang.ClassNotFoundException: org.eclipse.mylyn.commons.net.AuthenticationCredentials
   at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
   at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
Caused: java.lang.ClassNotFoundException: org.eclipse.mylyn.commons.net.AuthenticationCredentials starting from ModuleCL@3c750372[org.netbeans.modules.bugzilla] with possible defining loaders [Netigso[reference:file:ide/modules/org-eclipse-mylyn-commons-net.jar]] and declared parents [ModuleCL@32bed4f[org.netbeans.modules.keyring], ModuleCL@70dc6f58[org.openide.windows], Netigso[reference:file:ide/modules/org-apache-commons-httpclient.jar], org.netbeans.MainImpl$BootClassLoader@6c07588c, Netigso[reference:file:ide/modules/org-eclipse-mylyn-commons-net.jar], ModuleCL@2ea866d6[org.openide.dialogs], ModuleCL@7c88cc5f[org.netbeans.modules.projectapi], ModuleCL@51e2299d[org.netbeans.libs.osgi], ModuleCL@31f78388[org.openide.nodes], Netigso[reference:file:ide/modules/org-eclipse-mylyn-tasks-core.jar], ...11 more]
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:264)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
Caused: java.lang.NoClassDefFoundError: org/eclipse/mylyn/commons/net/AuthenticationCredentials
   at org.netbeans.modules.bugzilla.util.MylynUtils.setCredentials(MylynUtils.java:78)
   at org.netbeans.modules.bugzilla.util.MylynUtils.createTaskRepository(MylynUtils.java:72)
   at org.netbeans.modules.bugzilla.repository.BugzillaRepository.createTaskRepository(BugzillaRepository.java:436)
   at org.netbeans.modules.bugzilla.repository.BugzillaRepository.<init>(BugzillaRepository.java:145)
   at org.netbeans.modules.bugzilla.repository.NBRepositorySupport.createRepositoryIntern(NBRepositorySupport.java:163)
   at org.netbeans.modules.bugzilla.repository.NBRepositorySupport.getNBRepository(NBRepositorySupport.java:131)
   at org.netbeans.modules.bugzilla.api.NBBugzillaUtils.openIssue(NBBugzillaUtils.java:68)
   at org.netbeans.modules.bugzilla.exceptionreporter.NBBugzillaAccessorImpl$1.run(NBBugzillaAccessorImpl.java:63)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NoClassDefFoundError: org/eclipse/mylyn/commons/net/AuthenticationCredentials
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:424)
   at org.netbeans.modules.bugzilla.exceptionreporter.NBBugzillaAccessorImpl.openIssue(NBBugzillaAccessorImpl.java:60)
   at org.netbeans.modules.exceptions.ReporterResultTopComponent.hyperlinkUpdate(ReporterResultTopComponent.java:388)
   at javax.swing.JEditorPane.fireHyperlinkUpdate(JEditorPane.java:345)
   at javax.swing.text.html.HTMLEditorKit$LinkController.activateLink(HTMLEditorKit.java:877)
   at javax.swing.text.html.HTMLEditorKit$LinkController.mouseClicked(HTMLEditorKit.java:676)
   at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
   at java.awt.Component.processMouseEvent(Component.java:6508)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6270)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4501)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2719)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:703)
   at java.awt.EventQueue.access$000(EventQueue.java:102)
   at java.awt.EventQueue$3.run(EventQueue.java:662)
   at java.awt.EventQueue$3.run(EventQueue.java:660)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:676)
   at java.awt.EventQueue$4.run(EventQueue.java:674)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:673)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)