java.lang.NullPointerException: This exception has no message.

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This exception has no message.
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java.lang.NullPointerException:
at java.io.Reader.(Reader.java:78)
at java.io.InputStreamReader.(InputStreamReader.java:97)
at com.github.javafxd3.javafx.JavaFxD3Browser.getJavaScriptLibraryFromFile(JavaFxD3Browser.java:252)
at com.github.javafxd3.javafx.JavaFxD3Browser.injectD3(JavaFxD3Browser.java:163)
at com.github.javafxd3.javafx.JavaFxD3Browser.injectJavaScriptLibraries(JavaFxD3Browser.java:151)
at com.github.javafxd3.javafx.JavaFxD3Browser.lambda$registerLoadingFinishedHook$1(JavaFxD3Browser.java:134)
at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyObjectPropertyBase.fireValueChangedEvent(ReadOnlyObjectPropertyBase.java:74)
at javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:102)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:112)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:146)
at javafx.scene.web.WebEngine$LoadWorker.updateState(WebEngine.java:1260)
at javafx.scene.web.WebEngine$LoadWorker.dispatchLoadEvent(WebEngine.java:1371)
at javafx.scene.web.WebEngine$LoadWorker.access$1200(WebEngine.java:1253)
at javafx.scene.web.WebEngine$PageLoadListener.dispatchLoadEvent(WebEngine.java:1240)
at com.sun.webkit.WebPage.fireLoadEvent(WebPage.java:2400)
at com.sun.webkit.WebPage.fwkFireLoadEvent(WebPage.java:2244)
at com.sun.webkit.Timer.twkFireTimerEvent(Native Method)
at com.sun.webkit.Timer.fireTimerEvent(Timer.java:83)
at com.sun.webkit.Timer.notifyTick(Timer.java:64)
at javafx.scene.web.WebEngine$PulseTimer.lambda$static$45(WebEngine.java:1201)
at com.sun.javafx.tk.Toolkit.lambda$runPulse$30(Toolkit.java:355)
at com.sun.javafx.tk.Toolkit.runPulse(Toolkit.java:354)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:381)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:510)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:490)
at com.sun.javafx.tk.quantum.QuantumToolkit.lambda$runToolkit$404(QuantumToolkit.java:319)
at com.sun.glass.ui.InvokeLaterDispatcher$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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