NullPointerException: The content parameter cannot be null

Caused: org.netbeans.modules.parsing.spi.ParseException
    at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:186)
    at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:81)
[catch] at org.netbeans.modules.csl.hints.infrastructure.HintsTask.run(HintsTask.java:69)
    at org.netbeans.modules.csl.hints.infrastructure.HintsTask.run(HintsTask.java:52)
    at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
    at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:786)
    at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279)
    at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:702)
    at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:663)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
    at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
    at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
INFO [org.netbeans.modules.parsing.impl.TaskProcessor]: Task: org.netbeans.modules.csl.hints.infrastructure.HintsTask@8184cef : class org.netbeans.modules.csl.hints.infrastructure.HintsTask ignored cancel for 4,830 ms.
INFO [org.netbeans.modules.parsing.impl.TaskProcessor]: Task: org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask@2fb59f88 : class org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask ignored cancel for 89 ms.
INFO [org.netbeans.modules.parsing.impl.TaskProcessor]: Task: org.netbeans.modules.csl.hints.infrastructure.SuggestionsTask@5579e03c : class org.netbeans.modules.csl.hints.infrastructure.SuggestionsTask ignored cancel for 1,461 ms.
WARNING [org.openide.filesystems.Ordering]: Not all children in / marked with the position attribute: [org-netbeans-modules-lsp-client-bindings-HyperlinkProviderImpl.instance], but some are: [org-netbeans-modules-csl-editor-hyperlink-GsfHyperlinkProvider.instance, HyperlinkProviderImpl.instance, org-netbeans-modules-editor-url-HyperlinkImpl.instance]