Failed to load the widgetset

I am trying a simple Vaadin 7 (beta 8) app.

This my single and very simple UI class:

public class MainUI extends UI {

	protected void init(VaadinRequest request) {
		VerticalLayout view = new VerticalLayout();
		view.addComponent(new Label("Hello Vaadin!"));

When loading the application, my browser displays the following error message:

Failed to load the widgetset: /myapp/VAADIN/widgetsets/com.vaadin.DefaultWidgetSet/com.vaadin.DefaultWidgetSet.nocache.js?1352494554184

What might go wrong here?

I missed the dependency to vaadin-client-compiled. It’s working fine now.