SceneBuilder with JavaFX using Intellij won't load the code to my fxml file

Question

Figure.1

Figure.2

I'm having problem loading my code to my fxml file even tho they have the same filename.The code won't automatically add to my fxml file when I put those 3 buttons.(See Figure.1). I didn't open the scenebuilder inside of my intellij becase of having that error(See figure.2) thus, I right clicked 'SceneBuilderProject.fxml' and clicked 'Open in SceneBuilder'. Any suggestion to verify the path from scenebuilder to the javafx i'm working with?

java.lang.ClassNotFoundException: com.sun.javafx.fxml.LoadListener PluginClassLoader[org.jetbrains.plugins.javaFX, 192.5728.98] com.intellij.ide.plugins.cl.PluginClassLoader@3104190

java.lang.NoClassDefFoundError: com/sun/javafx/fxml/LoadListener

    com.intellij.diagnostic.PluginException: While loading class com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader: com/sun/javafx/fxml/LoadListener [Plugin: org.jetbrains.plugins.javaFX

Above is the actual error from figure.2

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("SceneBuilderProject.fxml"));
        primaryStage.setTitle("SceneBuildProject");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}

Above is the Main Class.

Answer 1

Use:

FXMLLoader.load(getClass().getResource("src/SceneBuildPackage/SceneBuilderProject.fxml"));

instead of:

FXMLLoader.load(getClass().getResource("SceneBuilderProject.fxml"));