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Children: child node is null: parent = FlowPane@141567b[styleClass=root]
java.lang.NullPointerException: Children: child node is null: parent = Group@1cb63fd[styleClass=root] at javafx.scene.Parent$1.onProposedChange(Parent.java:316) at com.sun.javafx.collections.VetoableObservableList.add(VetoableObservableList.java:165) at com.sun.javafx.collections.ObservableListWrapper.add(ObservableListWrapper.java:144) at Cores.FXVideoPlayer$3.run(FXVideoPlayer.java:87) at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179) at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:176) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:176) at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29) at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73) at java.lang.Thread.run(Thread.java:722)