What is this error?

Hi all,

I'm working through JavaFX, and I'm getting an odd error, even though I'm pretty sure my code is correct:

I've switched that original app I was using to load from FXML. Can you do me a favor and add a new Text node in the boombox.fxml file please? Make the text say "Boombox".

<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>
<VBox fx:controller="com.example.Controller"
      xmlns:fx="http://javafx.com/fxml">

    <!-- Add your element below -->
    <Text text="Boombox" />


    <Button text="Play"/>
</VBox>

And here is the error I am receiving:

Bummer! java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: javafx.fxml.LoadException: /workdir/com/example/boombox.fxml:8 (Look around WaitForAsyncUtils.java line 150)

Any help would be greatly appreciated!

Alex

EDIT: Looks like restarting the browser allowed the challenge to work properly, the code above is correct. Not sure why I was getting that error previously.