Exception in Aplication start method -- JavaFx with Intellj - object

Question

I am trying to learn how to code with JavaFx but every time I try to create an object (ex.: WebView webview = new Webview();) I get this error:
ERROR-START{
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:567) 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:567) 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$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:830) Caused by:
java.lang.IllegalAccessError: superclass access check failed: class
com.sun.javafx.sg.prism.web.NGWebView (in unnamed module #0x7dab7530)
cannot access class com.sun.javafx.sg.prism.NGGroup (in module
javafx.graphics) because module javafx.graphics does not export
com.sun.javafx.sg.prism to unnamed module #0x7dab7530 at
java.base/java.lang.ClassLoader.defineClass1(Native Method) at
java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016) at
java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
at
java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:821)
at
java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:719)
at
java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:642)
at
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:600)
at
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at AppL.start(AppL.java:8) 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$10(PlatformImpl.java:428)
at
java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at
javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$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.win.WinApplication._runLoop(Native
Method) at
javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
... 1 more Exception running application AppL
}ERROR-ENDING
I've tried to add: (I also added the PATH_TO_FX Path-variable)
--module-path ${PATH_TO_FX} --add-modules javafx.controls,javafx.fxml
to the run configurations VM-options but it only changed the error I had before this error. I tried to do this on Windows AND on Linux, neither works.
Intellj shows me that every thing works, but it doesn't.
I wanted to use netbeans or eclipse but I don't know how to add libraries to them.
That would helb me to.
Example code:
import javafx.application.Application;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
public class AppL extends Application {
#Override
public void start(Stage stage) throws Exception {
WebView v = new WebView();
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Thanks to anyone who wants to help me, and who doesn't lauph on my english-scills😊