JavaFX and FXML - no data displayed in TableView

Question

I'm pretty new at JavaFX and i'm trying basic functionalities. I'm also using SceneBuilder (FXML) to create my views.

I created a TableView with SceneBuilder, with no columns (will be added in code) with id tablePeople. The goal is to store people into this table, like many examples of basic use of TableView. Here is my Person class (I want to store every properties of this class in the table) :

public class Person {

private SimpleStringProperty name;
private SimpleStringProperty forename;
private ObjectProperty<LocalDate> date; 
private SimpleStringProperty message;

    public Person(String name, String forename, LocalDate date, String message) {
        this.name = new SimpleStringProperty(name);
        this.forename = new SimpleStringProperty(forename);
        this.date = new SimpleObjectProperty<LocalDate>(date);
        this.message = new SimpleStringProperty(message);
    }

    // all getters/setters here
}

I correctly get my TableView from FXML:

@FXML
private TableView<Person> tablePeople;

At the start of the application (after loading FXML and before showing the stage), I fill my TableView with random datas by using this method I created in FXML controller:

public void initParametersView() {
    tablePeople.setEditable(true);
    tablePeople.setDisable(false);
    String dateStr = "01.01.2001";
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
    LocalDate date = null;
    date = LocalDate.parse(dateStr,formatter);
    ObservableList<Person> people = FXCollections.observableArrayList(

                new Person("Name1", "Forename1", date, "a"),
                new Person("Name2", "Forename2", date, "b"),
                new Person("Name3", "Forename3", date, "c"),
                new Person("Name4", "Forename4", date, "d")

            );

    tablePeople.setItems(people);

    TableColumn<Person, String> tcName = new TableColumn<>("Name");
    tcName.setCellValueFactory(new PropertyValueFactory<Person,String>("name"));
    tablePeople.getColumns().add(tcName);

    TableColumn<Person, String> tcForename = new TableColumn<>("Forename");
    tcForename.setCellValueFactory(new PropertyValueFactory<Person,String>("forename"));
    tablePeople.getColumns().add(tcForename);

    TableColumn<Person, LocalDate> tcDate = new TableColumn<>("Date");
    tcDate.setCellValueFactory(new PropertyValueFactory<Person,LocalDate>("date"));
    tablePeople.getColumns().add(tcDate);

    TableColumn<Person, String> tcMessage = new TableColumn<>("Message");
    tcMessage.setCellValueFactory(new PropertyValueFactory<Person,String>("message"));
    tablePeople.getColumns().add(tcMessage);

}

As you can see, through this:

• I create an ObservableList of Person which is given to the table.
• I create each column which are (should...) using Person's properties values and add it to the TableView

RESULT :

I get the TableView with the columns I created but datas are not displayed. However, datas seems to have been put into the table, because I can select the first 4 lines of the table (4 instances of Person were created). You can see it here:

What I tried

• I first tried to create my columns with SceneBuilder, get them in my controller and set cell values directly, but same result.
• I tried functions on table/columns like setEditable, refresh, but still no data displayed :-(

Where am I wrong?

Thank you very much for the help.