java.lang.IllegalArgumentException: Called DataObject.find on null
   at org.openide.loaders.DataObject.find(DataObject.java:608)
   at org.netbeans.atlassian.maven.spi.PluginModulesNodeFactory$PluginModulesChildren.<init>(PluginModulesNodeFactory.java:162)
   at org.netbeans.atlassian.maven.spi.PluginModulesNodeFactory$PluginModulesNode.<init>(PluginModulesNodeFactory.java:130)
   at org.netbeans.atlassian.maven.spi.PluginModulesNodeFactory$PluginModulesNL.node(PluginModulesNodeFactory.java:109)
   at org.netbeans.atlassian.maven.spi.PluginModulesNodeFactory$PluginModulesNL.node(PluginModulesNodeFactory.java:59)
   at org.netbeans.spi.project.ui.support.NodeFactorySupport$DelegateChildren.createNodes(NodeFactorySupport.java:167)
   at org.netbeans.spi.project.ui.support.NodeFactorySupport$DelegateChildren.createNodes(NodeFactorySupport.java:139)
   at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1679)
   at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:149)
   at org.openide.nodes.EntrySupportDefault$Info.nodes(EntrySupportDefault.java:805)
   at org.openide.nodes.EntrySupportDefault.updateAdd(EntrySupportDefault.java:441)
   at org.openide.nodes.EntrySupportDefault.setEntries(EntrySupportDefault.java:295)
   at org.openide.nodes.EntrySupport.setEntries(EntrySupport.java:83)
   at org.openide.nodes.Children$Keys$2.run(Children.java:1573)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation$1Exec.run(DefaultMutexImplementation.java:1016)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1938)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.postRequest(DefaultMutexImplementation.java:1022)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.postRequest(DefaultMutexImplementation.java:985)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.postWriteRequest(DefaultMutexImplementation.java:356)
   at org.openide.util.Mutex.postWriteRequest(Mutex.java:388)
   at org.openide.nodes.Children$Keys.applyKeys(Children.java:1582)
   at org.openide.nodes.Children$Keys.setKeys(Children.java:1526)
   at org.netbeans.spi.project.ui.support.NodeFactorySupport$DelegateChildren.access$800(NodeFactorySupport.java:139)
   at org.netbeans.spi.project.ui.support.NodeFactorySupport$DelegateChildren$1.run(NodeFactorySupport.java:212)
   at org.openide.util.RequestProcessor$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)