java.lang.IllegalStateException: You are trying to modify lookup from lookup query!
        at org.openide.util.lookup.AbstractLookup.checkForTreeModification(AbstractLookup.java:103)
        at org.openide.util.lookup.AbstractLookup.access$200(AbstractLookup.java:32)
        at org.openide.util.lookup.AbstractLookup$R.allItems(AbstractLookup.java:602)
        at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:553)
        at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:368)
        at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:319)
        at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:368)
        at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:319)
        at org.openide.ErrorManager$DelegatingErrorManager.resultChanged(ErrorManager.java:457)
        at org.openide.util.lookup.AbstractLookup.notifyListeners(AbstractLookup.java:373)
        at org.openide.util.lookup.ProxyLookup$R.resultChanged(ProxyLookup.java:405)
        at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:109)
        at org.netbeans.core.NbTopManager$Lkp.doInitializeLookup(NbTopManager.java:833)
        at org.netbeans.core.NbTopManager$Lkp.modulesClassPathInitialized(NbTopManager.java:816)
        at org.netbeans.core.modules.NbInstaller.load(NbInstaller.java:253)
        at org.netbeans.core.modules.ModuleManager.enable(ModuleManager.java:847)
        at org.netbeans.core.modules.ModuleList.installNew(ModuleList.java:544)
        at org.netbeans.core.modules.ModuleList.trigger(ModuleList.java:488)
        at org.netbeans.core.modules.ModuleSystem.scanForNewAndRestore(ModuleSystem.java:250)
        at org.netbeans.core.NonGui.run(NonGui.java:478)
        at org.netbeans.core.Main.run(Main.java:212)
        at org.netbeans.core.NbTopManager.getNbTopManager(NbTopManager.java:227)
        at org.netbeans.core.NbTopManager.get(NbTopManager.java:186)
        at org.netbeans.core.Main.start(Main.java:386)
[catch] at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:79)
        at java.lang.Thread.run(Thread.java:536)