java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at net.sf.jabref.gui.AbstractView.getView(AbstractView.java:25)
at net.sf.jabref.gui.help.AboutDialogView.show(AboutDialogView.java:15)
at net.sf.jabref.gui.help.AboutAction.lambda$actionPerformed$0(AboutAction.java:22)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)

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