java.lang.NullPointerException: The lib parameter cannot be null
   at org.openide.util.Parameters.notNull(Parameters.java:89)
   at org.netbeans.spi.project.support.ant.ReferenceHelper.copyLibrary(ReferenceHelper.java:1552)
   at org.netbeans.modules.scala.project.J2SEProjectGenerator.copyRequiredLibraries(J2SEProjectGenerator.java:334)
   at org.netbeans.modules.scala.project.J2SEProjectGenerator.access$100(J2SEProjectGenerator.java:78)
   at org.netbeans.modules.scala.project.J2SEProjectGenerator$1$1.run(J2SEProjectGenerator.java:106)
   at org.netbeans.modules.scala.project.J2SEProjectGenerator$1$1.run(J2SEProjectGenerator.java:104)
   at org.openide.util.Mutex.writeAccess(Mutex.java:438)
   at org.netbeans.modules.scala.project.J2SEProjectGenerator$1.run(J2SEProjectGenerator.java:104)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:609)
   at org.netbeans.modules.scala.project.J2SEProjectGenerator.createProject(J2SEProjectGenerator.java:97)
   at org.netbeans.modules.scala.project.ui.wizards.NewJ2SEProjectWizardIterator.instantiate(NewJ2SEProjectWizardIterator.java:182)
   at org.openide.loaders.TemplateWizard$InstantiatingIteratorBridge.instantiate(TemplateWizard.java:1044)
   at org.openide.loaders.TemplateWizard.handleInstantiate(TemplateWizard.java:605)
   at org.openide.loaders.TemplateWizard.instantiateNewObjects(TemplateWizard.java:439)
   at org.openide.loaders.TemplateWizardIterImpl.instantiate(TemplateWizardIterImpl.java:253)
   at org.openide.loaders.TemplateWizardIteratorWrapper$ProgressInstantiatingIterator.instantiate(TemplateWizardIteratorWrapper.java:180)
   at org.openide.WizardDescriptor.callInstantiateOpen(WizardDescriptor.java:1626)
   at org.openide.WizardDescriptor.callInstantiate(WizardDescriptor.java:1570)
   at org.openide.WizardDescriptor.access$2300(WizardDescriptor.java:92)
   at org.openide.WizardDescriptor$Listener$2$1.run(WizardDescriptor.java:2257)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)