default data passed through BaseController

Hi there...

I'm trying to do my first project with CodeIgniter 4.

I want to pass standard data to View set inside the BaseController. 

But following code does not work:
Controller (BaseController)

PHP Code:

public $data = [
    'title' => 'defaultTitle',
   ];

/**
 * Constructor.
 */
public function initController(\CodeIgniter\HTTP\RequestInterface $request, \CodeIgniter\HTTP\ResponseInterface $response, \Psr\Log\LoggerInterface $logger)
{
   // Do Not Edit This Line
   parent::initController($request, $response, $logger);

   //--------------------------------------------------------------------
   // Preload any models, libraries, etc, here.
   //--------------------------------------------------------------------
   // E.g.:
   // $this->session = \Config\Services::session();

       $this->session = \Config\Services::session();
} 


Users Controller:

PHP Code:

public function index()
    {
        $this->data['title'] = 'my own title';
        echo view('users/profile',$this->data);
    } 


I want to have default variables which I can change in the controller.

Any Ideas ?

Thanks,
Kigh...

---

Now it works fine, but I get an error with preloading "session":

Fatal error: Uncaught ErrorException: touch(): Unable to create file NULL/ci_session7roacrtom0dsiftqc3pdd0j1jnjv6ejo because No such file or directory in C:\xampp\htdocs\kighlander.local\system\Session\Handlers\FileHandler.php:252 Stack trace: #0 [internal function]: CodeIgniter\Debug\Exceptions->errorHandler(2, 'touch(): Unable...', 'C:\\xampp\\htdocs...', 252, Array) #1 C:\xampp\htdocs\kighlander.local\system\Session\Handlers\FileHandler.php(252): touch('NULL/ci_session...') #2 [internal function]: CodeIgniter\Session\Handlers\FileHandler->write('7roacrtom0dsift...', '__ci_last_regen...') #3 [internal function]: session_write_close() #4 {main} thrown in C:\xampp\htdocs\kighlander.local\system\Session\Handlers\FileHandler.php on line 252