Fatal error: Uncaught TypeError: mb_internal_encoding()

Hi,
I’m getting this error :

Fatal error : Uncaught TypeError: mb_internal_encoding() expects parameter 1 to be string, null given in /var/www/html/project_name/config/bootstrap.php:345.

I have this code there:

mb_internal_encoding(Configure::read('App.encoding'));

The code Configure::read('App.encoding') returns null

I’m using CAKEPHP 4.3 and PHP 7.2

Thanks!

Hello,
I fix it.
I was missing the configuration attributes inside app.php:

    'App' => [
        'namespace' => 'App',
        'encoding' => env('APP_ENCODING', 'UTF-8'),
        'defaultLocale' => env('APP_DEFAULT_LOCALE', 'en_US'),
        'defaultTimezone' => env('APP_DEFAULT_TIMEZONE', 'UTC'),
        'base' => false,
        'dir' => 'src',
        'webroot' => 'webroot',
        'wwwRoot' => WWW_ROOT,
        //'baseUrl' => env('SCRIPT_NAME'),
        'fullBaseUrl' => false,
        'imageBaseUrl' => 'img/',
        'cssBaseUrl' => 'css/',
        'jsBaseUrl' => 'js/',
        'paths' => [
            'plugins' => [ROOT . DS . 'plugins' . DS],
            'templates' => [ROOT . DS . 'templates' . DS],
            'locales' => [RESOURCES . 'locales' . DS],
        ],
    ],

Thanks!