widgets are not displaying on a custom dashboard despite following the README.md instructions

[devhoussam1998]

Dashboard.php

<?php

namespace App\Filament\Admin\Pages;

use Filament\Pages\Page;
use Illuminate\Contracts\Support\Htmlable;
use BezhanSalleh\FilamentGoogleAnalytics\Widgets;

class Dashboard extends Page
{
    protected static ?string $slug = 'dashboard';

    protected static string $view = 'filament.admin.pages.dashboard';

    protected function getHeaderWidgets(): array
    {
        return [
            Widgets\PageViewsWidget::class,
            Widgets\VisitorsWidget::class,
            Widgets\ActiveUsersOneDayWidget::class,
            Widgets\ActiveUsersSevenDayWidget::class,
            Widgets\ActiveUsersTwentyEightDayWidget::class,
            Widgets\SessionsWidget::class,
            Widgets\SessionsDurationWidget::class,
            Widgets\SessionsByCountryWidget::class,
            Widgets\SessionsByDeviceWidget::class,
            Widgets\MostVisitedPagesWidget::class,
            Widgets\TopReferrersListWidget::class,
        ];
    }
}