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java.lang.NullPointerException: 	at org.codefx.libfx.control.webview.DefaultWebViewHyperlinkListenerHandle.onEachLinkForEachManagedEventType(DefaultWebViewHyperlinkListenerHandle.java:200)	at org.codefx.libfx.control.webview.DefaultWebViewHyperlinkListenerHandle.attachListenerInApplicationThread(DefaultWebViewHyperlinkListenerHandle.java:147)	at org.codefx.libfx.control.webview.DefaultWebViewHyperlinkListenerHandle.lambda$attachInApplicationThreadEachTimeLoadSucceeds$38(DefaultWebViewHyperlinkListenerHandle.java:133)	at org.codefx.libfx.concurrent.when.ExecuteAlwaysWhen.tryExecuteAction(ExecuteAlwaysWhen.java:168)	at org.codefx.libfx.concurrent.when.ExecuteAlwaysWhen.lambda$new$17(ExecuteAlwaysWhen.java:121)	at com.sun.javafx.binding.ExpressionHelper$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:2416)	at com.sun.webkit.WebPage.fwkFireLoadEvent(WebPage.java:2260)	at com.sun.webkit.network.URLLoader.twkDidFinishLoading(Native Method)	at com.sun.webkit.network.URLLoader.notifyDidFinishLoading(URLLoader.java:838)	at com.sun.webkit.network.URLLoader.lambda$didFinishLoading$98(URLLoader.java:829)	at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)	at java.security.AccessController.doPrivileged(Native Method)	at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)	at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)	at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)	at java.lang.Thread.run(Thread.java:745)