java.lang.IllegalStateException: You are trying to modify lookup from lookup query!
    at org.openide.util.lookup.AbstractLookup.checkForTreeModification(AbstractLookup.java:104)
    at org.openide.util.lookup.AbstractLookup.access$200(AbstractLookup.java:33)
    at org.openide.util.lookup.AbstractLookup$R.allItems(AbstractLookup.java:597)
    at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:548)
    at org.openide.util.lookup.ProxyLookup$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.util.SharedClassObject$1$SOLoader.resultChanged(SharedClassObject.java:495)
    at org.openide.util.lookup.AbstractLookup.notifyListeners(AbstractLookup.java:368)
    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:840)
    at org.netbeans.core.NbTopManager$Lkp.modulesClassPathInitialized(NbTopManager.java:823)
    at org.netbeans.core.modules.NbInstaller.load(NbInstaller.java:254)
    at org.netbeans.core.modules.ModuleManager.enable(ModuleManager.java:847)
    at org.netbeans.core.modules.ModuleList.installNew(ModuleList.java:553)
    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:471)
    at org.netbeans.core.Main.run(Main.java:233)
    at org.netbeans.core.NbTopManager.getNbTopManager(NbTopManager.java:236)
    at org.netbeans.core.NbTopManager.get(NbTopManager.java:195)
    at org.netbeans.core.Main.start(Main.java:407)
    at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:79)
[catch] at java.lang.Thread.run(Thread.java:536)