title: JavaFX Label Causes Exception
body: <p>I am trying to add a label to a JavaFX application, however, whenever I try to make a Label, I get an error. Without the <code>Label label = new Label("Label");</code> line I get no errors, and the program works as intended. Is there anything I can do to fix this?</p>
  
  <p>I just started using JavaFX so I don't really know much.</p>
  
  <pre><code>import javafx.application.Application;
  import javafx.scene.layout.FlowPane;
  import javafx.stage.*;
  import javafx.scene.*;
  import javafx.scene.layout.*;
  import javafx.scene.control.Label;
  
  public class Main extends Application {
  
  public static void main(String[] args){
      launch(args);
  }
  
  public void start(Stage stage){
      stage.setTitle("Label");
  
      FlowPane rootNode = new FlowPane();
  
      Scene scene = new Scene(rootNode, 300, 300);
  
      stage.setScene(scene);
  
      //Whenever I add this line to the code I start getting errors.
      Label label = new Label("This is a JavFX Application");
      //rootNode.getChildren().add(label);
  
      stage.show();
  }
  }
  </code></pre>
  
  <p>Errors: </p>
  
  <pre><code>Exception in Application start method
  java.lang.reflect.InvocationTargetException
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.base/java.lang.reflect.Method.invoke(Method.java:566)
  at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
  at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.base/java.lang.reflect.Method.invoke(Method.java:566)
  at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
  Caused by: java.lang.RuntimeException: Exception in Application start method
  at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
  at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
  at java.base/java.lang.Thread.run(Thread.java:834)
  Caused by: java.lang.IllegalAccessError: superclass access check failed: class com.sun.javafx.scene.control.ControlHelper (in unnamed module @0x406f1e78) cannot access class com.sun.javafx.scene.layout.RegionHelper (in module javafx.graphics) because module javafx.graphics does not export com.sun.javafx.scene.layout to unnamed module @0x406f1e78
  at java.base/java.lang.ClassLoader.defineClass1(Native Method)
  at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
  at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
  at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:802)
  at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:700)
  at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:623)
  at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
  at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
  at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
  at javafx.scene.control.Control.&lt;clinit&gt;(Control.java:86)
  at Main.start(Main.java:23)
  at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
  at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
  at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
  at java.base/java.security.AccessController.doPrivileged(Native Method)
  at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
  at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
  Exception running application Main
  </code></pre>