PROSAGA码农传奇-idea-创建标签时的JavaFX 11：IllegalAccessError 问题

这个问题可能是同一个问题的这一个，但现在看来，一个的提问者还没有添加足够的信息来获得一个有用的响应。我正在尝试使用JDK和JavaFx SDK版本11.0.2运行JavaFx应用程序。此代码完全按预期工作，从而产生一个空窗口：
<pre><code>import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class Main extends Application {

public void start(Stage primaryStage) throws Exception {
        StackPane root = new StackPane();
        primaryStage.setScene(new Scene(root, 420, 420));
        primaryStage.show();
    }

public static void main(String[] args) {
 launch(args);
 }
}
</code></pre>但是，如果我尝试向添加标签StackPane，则会引发异常。
<pre><code>import ...
import javafx.scene.control.Label;

public class Main extends Application {

public void start(Stage primaryStage) throws Exception {
        StackPane root = new StackPane();
        root.getChildren().add(new Label("42"));
        primaryStage.setScene(new Scene(root, 420, 420));
        primaryStage.show();
    }

public static void main(String[] args) {
 launch(args);
 }
}
</code></pre>它产生的堆栈跟踪如下所示（Main中的第13行是创建Label的位置）：
<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$2(LauncherImpl.java:195)
 at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.IllegalAccessError: superclass access check failed: class com.sun.javafx.scene.control.ControlHelper (in unnamed module @0xbbd2743) cannot access class com.sun.javafx.scene.layout.RegionHelper (in module javafx.graphics) because module javafx.graphics does not export com.sun.javafx.scene.layout to unnamed module @0xbbd2743
 at java.base/java.lang.ClassLoader.defineClass1(Native Method)
 at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
 at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
 at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:802)
 at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:700)
 at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:623)
 at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
 at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
 at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
 at javafx.scene.control.Control.<clinit>(Control.java:86)
 at sample.Main.start(Main.java:13)
 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)
 at javafx.graphics/com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
 at javafx.graphics/com.sun.glass.ui.gtk.GtkApplication.lambda$runLoop$11(GtkApplication.java:277)
 ... 1 more
Exception running application sample.Main
</code></pre>我正在Kubuntu上运行IntelliJ Idea的最新版本。我从官方网站下载了Oracle JDK和JavaFX我放在javafx-sdk-11.0.2目录中/usr/lib/jvm/，jdk-11.0.2并且在同一目录中。我相信在IntelliJ Idea中，我已经正确选择了JDK，并且已将其添加/usr/lib/jvm/javafx-sdk-11.0.2/lib为库。IntelliJ Idea正在使用此命令来启动应用程序（为提高可读性而拆分）：
<pre><code>/usr/lib/jvm/jdk-11.0.2/bin/java
 -Djava.library.path=/usr/lib/jvm/javafx-sdk-11.0.2/lib
 --add-modules javafx.base,javafx.graphics
 --add-reads javafx.base=ALL-UNNAMED
 --add-reads javafx.graphics=ALL-UNNAMED
 -javaagent:/opt/jetbrains/idea-IU-183.4886.37/lib/idea_rt.jar=36031:/opt/jetbrains/idea-IU-183.4886.37/bin
 -Dfile.encoding=UTF-8
 -classpath
 /home/rm/IdeaProjects/JfxPlayground/out/production/JfxPlayground
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/src.zip
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx-swt.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.web.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.base.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.fxml.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.media.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.swing.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.controls.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.graphics.jar
 -p
 /usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.base.jar
 :/usr/lib/jvm/javafx-sdk-11.0.2/lib/javafx.graphics.jar
 sample.Main
</code></pre>我尚未修改任何VM选项。如何解决此错误？这是JavaFx中的错误吗？