java.util.ServiceConfigurationError: javax.xml.transform.TransformerFactory: Provider net.sf.saxon.TransformerFactoryImpl not found
   at java.util.ServiceLoader.fail(ServiceLoader.java:239)
   at java.util.ServiceLoader.access$300(ServiceLoader.java:185)
   at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:372)
   at java.util.ServiceLoader$LazyIterator.access$700(ServiceLoader.java:323)
   at java.util.ServiceLoader$LazyIterator$2.run(ServiceLoader.java:407)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:409)
   at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
   at javax.xml.transform.FactoryFinder$1.run(FactoryFinder.java:328)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
Caused: java.lang.RuntimeException: Provider for class javax.xml.transform.TransformerFactory cannot be created
Caused: javax.xml.transform.TransformerFactoryConfigurationError: Provider for class javax.xml.transform.TransformerFactory cannot be created
   at javax.xml.transform.FactoryFinder.findServiceProvider(FactoryFinder.java:345)
   at javax.xml.transform.FactoryFinder.find(FactoryFinder.java:299)
   at javax.xml.transform.TransformerFactory.newInstance(TransformerFactory.java:106)
   at org.eclipse.mylyn.internal.tasks.core.externalization.TaskListExternalizer.writeDocument(TaskListExternalizer.java:176)
   at org.eclipse.mylyn.internal.tasks.core.externalization.TaskListExternalizer.writeTaskList(TaskListExternalizer.java:119)
   at org.netbeans.modules.mylyn.util.MylynSupport$4.execute(MylynSupport.java:619)
   at org.eclipse.mylyn.internal.tasks.core.TaskList.run(TaskList.java:673)
   at org.eclipse.mylyn.internal.tasks.core.TaskList.run(TaskList.java:664)
   at org.eclipse.mylyn.internal.tasks.core.TaskList.run(TaskList.java:660)
   at org.netbeans.modules.mylyn.util.MylynSupport.persist(MylynSupport.java:591)
   at org.netbeans.modules.mylyn.util.MylynSupport$1.run(MylynSupport.java:184)
   at org.openide.util.RequestProcessor$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)