Chercher solution pour l'exception: java.lang.NullPointerException

Bonsoir,
Je veux insérer des données dans la base de données mais il m'affiche toujours "Exception in thread "main" java.lang.NullPointerException
at com.travelSmart.utils.MyConnection.<init>(MyConnection.java:32)"

Voici le code de la classe MyConnection.java:

Code:

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public class MyConnection {
 
    Properties properties;
    private String url;
    private String login;
    private String password;
    private Connection connection;
    private static MyConnection instance;
 
    private MyConnection() {
        if (connection == null) {
            properties = new Properties();
            try {
                properties.load(new FileInputStream(new File("Configuration.properties")));
                url = properties.getProperty("url");
                login = properties.getProperty("utilisateur");
                password = properties.getProperty("pwd");
                connection = DriverManager.getConnection(url, login, password);
                System.out.println("Connection established");
            } catch (SQLException | IOException ex) {
                Logger.getLogger(MyConnection.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }
 
    public Connection getConnection() {
        return connection;
    }
 
    public static MyConnection getInstance() {
        if (instance == null) {
            instance = new MyConnection();
        }
        return instance;
    }
}