When SwingJavaFXChart is launched as stand alone NPE thrown over and over. Again the same NPE when adjusting data values.

java.lang.NullPointerException
        at com.sun.javafx.tk.quantum.EmbeddedScene$PaintRunnable.paintImpl(Unknown Source)
        at com.sun.javafx.tk.quantum.EmbeddedScene$PaintRunnable.run(Unknown Source)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
        at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
        at com.sun.prism.render.RenderJob.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at com.sun.javafx.tk.quantum.QuantumRenderer$ObservedRunnable.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

Steps:
Launch SwingJavaFXChart.jar from the command line with "java -jar SwingJavaFXChart.jar"
The exception will be seen.
Double click any cell in the data table and change the value and more NPE thrown