Codeigniter 4: authfilter filter must have a matching alias defined - linux

Question

I'm new to Codeigniter 4.
I'm developing something localy (Win10/XAMPP) and everything works fine. I uploaded code to linux hosting and suddenly I got error: authfilter filter must have a matching alias defined. 'authfilter' was an allias name in Config/Filters file. Than I noticed that allias is lowercased filter class name, so I changed allias to authfil and now I am getting error: Class 'App\Filters\AuthFilter' not found (SYSTEMPATH/Filters/Filters.php at line 167).
Can anyone explain to me what makes the difference; same code, Windows vs. Linux.
My App/Config/Filters contains following code:
namespace Config;
use CodeIgniter\Config\BaseConfig;
use CodeIgniter\Filters\CSRF;
use CodeIgniter\Filters\DebugToolbar;
use CodeIgniter\Filters\Honeypot;
use CodeIgniter\Filters\InvalidChars;
use CodeIgniter\Filters\SecureHeaders;
use App\Filters\FilterInterface;
use App\Filters\AuthFilter;
class Filters extends BaseConfig
{
/**
* Configures aliases for Filter classes to
* make reading things nicer and simpler.
*
* #var array
*/
public $aliases = [
'csrf' => CSRF::class,
'toolbar' => DebugToolbar::class,
'honeypot' => Honeypot::class,
'invalidchars' => InvalidChars::class,
'secureheaders' => SecureHeaders::class,
'authfil' => \App\Filters\AuthFilter::class,
];
/**
* List of filter aliases that are always
* applied before and after every request.
*
* #var array
*/
public $globals = [
'before' => [
// 'honeypot',
// 'csrf',
// 'invalidchars',
'authfil' ///=> ['except' => 'auth/login']
],
'after' => [
'toolbar',
// 'honeypot',
// 'secureheaders',
],
];
My routes looks like:
$routes->group('auth', ['filter' => 'authfil'],['namespace' => 'IonAuth\Controllers'], function ($routes) {
$routes->get('/', 'Auth::index');
$routes->add('login', 'Auth::login');
$routes->get('logout', 'Auth::logout');
...
}
Thanx in advance,
Siniša
P.S. I put: use App\Filters\AuthFilter to SYSTEMPATH/Filters/Filters.php but with no success. I also tried to add filter to the route, and all combinations that I can think of before I post the question.
The fact is, my project is quite large and today, after few months of working, I find out that I should use filters for login check instead of put login check inside initController function... InitController function is a strange approach to me, instead of using standard OOP concepts (constructors). However, there is a reason for everything, even if it's not obvious to me :).