java.lang.NullPointerException: Passed null to FileOwnerQuery.getOwner(FileObject)
   at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:95)
   at org.netbeans.modules.html.custom.CustomHtmlExtension.getConfiguration(CustomHtmlExtension.java:102)
   at org.netbeans.modules.html.custom.CustomHtmlExtension.isCustomTag(CustomHtmlExtension.java:90)
   at org.netbeans.modules.html.editor.gsf.HtmlGSFParser$1.isCustomTag(HtmlGSFParser.java:132)
   at org.netbeans.modules.html.editor.gsf.HtmlGSFParser$AggregatedUndeclaredContentResolver.isCustomTag(HtmlGSFParser.java:176)
   at org.netbeans.modules.html.editor.lib.api.SyntaxAnalyzerResult$ElementContentFilter.shouldBeFiltered(SyntaxAnalyzerResult.java:775)
   at org.netbeans.modules.html.editor.lib.api.SyntaxAnalyzerResult$ElementContentFilter.getMasks(SyntaxAnalyzerResult.java:743)
   at org.netbeans.modules.html.editor.lib.api.SyntaxAnalyzerResult.getMaskedAreas(SyntaxAnalyzerResult.java:515)
   at org.netbeans.modules.html.editor.lib.api.SyntaxAnalyzerResult.doParseHtml(SyntaxAnalyzerResult.java:282)
   at org.netbeans.modules.html.editor.lib.api.SyntaxAnalyzerResult.parseHtml(SyntaxAnalyzerResult.java:208)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.root(HtmlParserResult.java:142)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.getAllRoots(HtmlParserResult.java:204)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.findByPhysicalRange(HtmlParserResult.java:233)
   at org.netbeans.modules.html.editor.HtmlBracesMatching$2.run(HtmlBracesMatching.java:286)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:593)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
Caused: org.netbeans.modules.parsing.spi.ParseException
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:211)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.html.editor.HTMLBracesMatching.findMatches(HTMLBracesMatching.java:255)
   at org.netbeans.modules.editor.bracesmatching.MasterMatcher$Result._run(MasterMatcher.java:696)
   at org.netbeans.modules.editor.bracesmatching.MasterMatcher$Result.run(MasterMatcher.java:637)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)