"Missing JavaFX application class application.Main" when combining JavaFX with Apache POI

Question

I am working on a JavaFX project that has to access encrypted Excel files. When trying to use WorkbookFactory.create(InputStream inp, String password) while the Stage is shown, i get an java.lang.NoClassDefFoundError: org/apache/poi/EncryptedDocumentException. So for testing i tried accessing an encrypted Excel file before showing the stage. But as a result i get a Missing JavaFX application class application.Main error. I can't even start debug mode.

I am using Windows 11, Eclipse Version: 2021-12 (4.22.0), JDK Version: jdk-17.0.2

package application;
    
import java.io.FileInputStream;
import java.io.IOException;

import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;
import javafx.scene.Parent;
import javafx.scene.Scene;

public class Main extends Application {
    
    @Override
    public void start(Stage stage) {
        try {
            
            Parent root = FXMLLoader.load(getClass().getResource("MainScene.fxml"));
            Scene scene = new Scene(root);
            stage.setScene(scene);
            stage.show();

        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        
        String filePath = "C:\\Path\\To\\Sheet\\Excel_Sheet.xlsx";
        FileInputStream fis;
        XSSFWorkbook workbook;
        String password = "test";
        
        try {
            fis = new FileInputStream(filePath);
            workbook = (XSSFWorkbook)WorkbookFactory.create(fis, password);
        } catch (IOException | EncryptedDocumentException e) {
            e.printStackTrace();
        }
        
        launch(args);
    }
}