java.lang.NullPointerException: The delegate parameter cannot be null
   at org.openide.util.Parameters.notNull(Parameters.java:89)
   at org.netbeans.modules.j2ee.deployment.plugins.spi.support.ProxyOptionalFactory.getDelegate(ProxyOptionalFactory.java:168)
   at org.netbeans.modules.j2ee.deployment.plugins.spi.support.ProxyOptionalFactory.isCommonUIRequired(ProxyOptionalFactory.java:95)
   at org.netbeans.modules.j2ee.deployment.impl.bridge.ServerWizardProviderLookup.createBridgingInstance(ServerWizardProviderLookup.java:69)
   at org.netbeans.modules.j2ee.deployment.impl.bridge.ServerWizardProviderLookup.createBridgingInstance(ServerWizardProviderLookup.java:52)
   at org.netbeans.modules.j2ee.deployment.impl.bridge.AbstractServerLookup.stateChanged(AbstractServerLookup.java:160)
   at org.netbeans.modules.j2ee.deployment.impl.bridge.AbstractServerLookup.init(AbstractServerLookup.java:137)
   at org.netbeans.modules.j2ee.deployment.impl.bridge.AbstractServerLookup.beforeLookup(AbstractServerLookup.java:117)
   at org.openide.util.lookup.AbstractLookup$R.beforeLookup(AbstractLookup.java:1126)
   at org.openide.util.lookup.ProxyLookup$R.myBeforeLookup(ProxyLookup.java:676)
   at org.openide.util.lookup.ProxyLookup$R.beforeLookup(ProxyLookup.java:687)
   at org.openide.util.lookup.ProxyLookup$R.myBeforeLookup(ProxyLookup.java:676)
   at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:526)
   at org.openide.util.lookup.ProxyLookup$R.allItems(ProxyLookup.java:517)
   at org.netbeans.modules.server.ServerRegistry.getInstance(ServerRegistry.java:84)
   at org.netbeans.modules.server.ui.node.RootNode$ChildFactory$1.run(RootNode.java:185)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)