Session in CI 4 is not working accross the controller

I load it  in the BaseController.

And access it like this using the session helper:

PHP Code:

// Get session value using session helper
$user = session('user');
$value = session()->get('Item');
$value = session('Item');

// Save session value using session helper
session()->set('user', $this->user->id);
session()->set($userData);
session()->setFlashdata('error', lang('Auth.notLoggedIn')); 


Please, show all code your BaseController . Thank you in advance for your answer