java.lang.ClassCastException: org.netbeans.modules.html.editor.xhtml.XhtmlElLanguage$XhtmlELParser$FakeResult cannot be cast to org.netbeans.modules.html.editor.api.gsf.HtmlParserResult
   at org.netbeans.modules.css.visual.HtmlEditorSourceTask.run(HtmlEditorSourceTask.java:72)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:737)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:662)