java.lang.ClassNotFoundException: Will not load classes from default package (JavaFXTaskListProvider)
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:196)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
   at org.openide.loaders.InstanceSupport.findClass(InstanceSupport.java:497)
   at org.openide.loaders.InstanceSupport.instanceClass(InstanceSupport.java:145)
   at org.openide.loaders.InstanceDataObject$Ser.instanceClass(InstanceDataObject.java:1310)
   at org.openide.loaders.InstanceSupport.instanceCreate(InstanceSupport.java:211)
   at org.openide.loaders.InstanceDataObject$Ser.instanceCreate(InstanceDataObject.java:1380)
   at org.openide.loaders.InstanceDataObject.instanceCreate(InstanceDataObject.java:818)
   at org.openide.loaders.FolderLookup$ICItem.getInstance(FolderLookup.java:584)
   at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:999)
   at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:548)
   at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:488)
   at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:548)
   at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:488)
   at org.netbeans.modules.tasklist.impl.ScannerList.init(ScannerList.java:128)
   at org.netbeans.modules.tasklist.impl.ScannerList.getScanners(ScannerList.java:109)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl.getPushScanners(TaskManagerImpl.java:212)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl.attachPushScanners(TaskManagerImpl.java:198)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl.doObserve(TaskManagerImpl.java:159)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl.access$000(TaskManagerImpl.java:73)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl$1.run(TaskManagerImpl.java:103)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1367)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1905)