java.lang.IllegalArgumentException: language cannot be null
   at org.netbeans.lib.lexer.TokenHierarchyOperation.<init>(TokenHierarchyOperation.java:208)
   at org.netbeans.api.lexer.TokenHierarchy.create(TokenHierarchy.java:134)
   at org.netbeans.api.lexer.TokenHierarchy.create(TokenHierarchy.java:99)
   at org.netbeans.modules.latex.model.LaTeXParserResult.getTokenHierarchy(LaTeXParserResult.java:123)
   at org.netbeans.modules.latex.hints.AddItemHint.computeHints(AddItemHint.java:106)
   at org.netbeans.modules.latex.hints.AddItemHint.computeHints(AddItemHint.java:82)
   at org.netbeans.modules.latex.hints.HintsProcessor.handleNode(HintsProcessor.java:199)
   at org.netbeans.modules.latex.hints.SuggestionsProcessor.compute(SuggestionsProcessor.java:120)
   at org.netbeans.modules.latex.hints.SuggestionsProcessor.run(SuggestionsProcessor.java:77)
   at org.netbeans.modules.latex.hints.SuggestionsProcessor.run(SuggestionsProcessor.java:68)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:558)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:734)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:722)