Ошибка "class has no member named" в qt qreator

void MainWindow::setupMenuBar() {
    ui->actionSave->setEnabled(false);
    ui->actionSave_As->setEnabled(false);
    ui->actionAdd->setEnabled(false);
    ui->actionDelete->setEnabled(false);
    ui->tableView->setEnabled(false);
    ui->lineEdit->setEnabled(false);
}
 
 
void MainWindow::updateActtions(){
    ui->actionSave->setEnabled(true);
    ui->actionSave_As->setEnabled(true);
    ui->actionAdd->setEnabled(true);
    ui->actionDelete->setEnabled(true);
    ui->tableView->setEnabled(true);
    ui->lineEdit->setEnabled(true);
}

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
#include <QTableView>
#include <QLineEdit>
#include <QTranslator>
#include "ui_mainwindow.h"
#include <QLocale>
#include <QActionGroup>
#include "model.h"
#include "controller.h"
 
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
 
class QActionGroup;
class QLabel;
 
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
 
    MainWindow(QWidget *parent = nullptr);
 
 
    ~MainWindow();
 
protected:
 
    void closeEvent(QCloseEvent *event) override;
 
private slots:
 
    void onCellClicked(const QModelIndex &index);
 
 
    void onSearch(const QString &text);
 
 
    void onColumnHeaderClicked(int column);
 
 
    void on_actionAbout_dev_triggered();
 
 
    void on_actionAbout_Qt_triggered();
 
 
    void on_actionAdd_triggered();
 
 
    void on_actionDelete_triggered();
 
 
    void on_actionSave_As_triggered();
 
 
    void on_actionSave_triggered();
 
 
    void on_actionNew_triggered();
 
 
    void on_actionOpen_triggered();
 
private:
    Ui::MainWindow *ui;
    void setupMenuBar();
    void setupTableView();
    void setupSearchBar();
    void createLanguageMenu();
    void switchLanguage(QAction *action);
    void retranslateUi();
    void showContextMenu(const QPoint &pos);
    void getSettings();
    void setSettings();
    void updateActtions();
 
    QLineEdit *m_searchBar;
    Model *m_model;
    Controller *m_controller;
    int selectedrow = -1;
    int m_currentSearchColumn;
    int numfile = 0;
    QString filename;
    QMenu *languageMenu;
    QTranslator appTranslator;
    QTranslator qtTranslator;
    QActionGroup *languageActionGroup;
    QString qmPath;
    QString currentLocale;
};
 
#endif MAINWINDOW_H