java.lang.ClassFormatError: Illegal UTF8 string in constant pool in class file org/openide/util/MapFormat
   at java.lang.ClassLoader.defineClass1(ClassLoader.java:0)
   at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
   at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
   at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
   at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
   at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
   at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:172)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   at org.netbeans.modules.xml.XMLDataLoader.createPrimaryEntry(XMLDataLoader.java:181)
   at org.openide.loaders.MultiDataObject.createPrimaryEntry(MultiDataObject.java:1101)
   at org.openide.loaders.MultiDataObject.<init>(MultiDataObject.java:124)
   at org.openide.loaders.XMLDataObject.<init>(XMLDataObject.java:197)
   at org.netbeans.modules.xml.XMLDataObject.<init>(XMLDataObject.java:124)
   at org.netbeans.modules.xml.XMLDataLoader.createMultiObject(XMLDataLoader.java:166)
   at org.openide.loaders.MultiFileLoader.handleFindDataObject(MultiFileLoader.java:153)
   at org.openide.loaders.DataObjectPool.handleFindDataObject(DataObjectPool.java:161)
   at org.openide.loaders.DataLoader.findDataObject(DataLoader.java:407)
   at org.openide.loaders.DataLoader.findDataObject(DataLoader.java:380)
   at org.openide.loaders.DataLoaderPool.findDataObject(DataLoaderPool.java:535)
   at org.openide.loaders.FolderList.createBoth(FolderList.java:768)
   at org.openide.loaders.FolderList.getObjects(FolderList.java:564)
   at org.openide.loaders.FolderList.access$600(FolderList.java:77)
   at org.openide.loaders.FolderList$ListTask.computeResult(FolderList.java:963)
   at org.openide.loaders.FolderList$ListTask.run(FolderList.java:939)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)