java.lang.ClassFormatError: Unknown constant tag 55 in class file org/netbeans/modules/apisupport/project/layers/LayerNode$1BadgingMergedFileSystem$2
        at java.lang.ClassLoader.defineClass1(ClassLoader.java:0)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
        at org.netbeans.JarClassLoader.doLoadClass(JarClassLoader.java:239)
        at org.netbeans.ProxyClassLoader.selfLoadClass(ProxyClassLoader.java:294)
        at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:224)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
        at org.netbeans.modules.apisupport.project.layers.LayerNode$1BadgingMergedFileSystem.<init>(LayerNode.java:232)
        at org.netbeans.modules.apisupport.project.layers.LayerNode.badge(LayerNode.java:311)
        at org.netbeans.modules.apisupport.project.layers.LayerNode.access$1000(LayerNode.java:89)
        at org.netbeans.modules.apisupport.project.layers.LayerNode$LayerChildren.createNodes(LayerNode.java:194)
        at org.netbeans.modules.apisupport.project.layers.LayerNode$LayerChildren.createNodes(LayerNode.java:124)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1609)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:168)
        at org.openide.nodes.EntrySupport$Default$Info.nodes(EntrySupport.java:916)
        at org.openide.nodes.EntrySupport$Default.updateAdd(EntrySupport.java:499)
        at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:343)
        at org.openide.nodes.Children$Keys$2.run(Children.java:1503)
        at org.openide.util.Mutex$1Exec.run(Mutex.java:1239)
        at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1810)
        at org.openide.util.Mutex.postRequest(Mutex.java:1245)
        at org.openide.util.Mutex.postRequest(Mutex.java:1209)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:582)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1512)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1456)
        at org.netbeans.modules.apisupport.project.layers.LayerNode$LayerChildren.access$600(LayerNode.java:124)
        at org.netbeans.modules.apisupport.project.layers.LayerNode$LayerChildren$1.run(LayerNode.java:155)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)