Managing your applications

Hello,

Here's the way I followed when coding multiple applications in codeigniter 4:

I installed with composer. After, i create a new directory, the directory name is "backend" and i paste files like :

/backend
    /app
    /public
    /tests
    /writable



I changed paths like that in php scripts:

in app/Config/Paths.php the line numbers 23 and 38; 
     23 - public $systemDirectory = __DIR__ . '/../../../vendor/codeigniter4/framework/system';
     38 - public $appDirectory = __DIR__ . '/..'; 

in public/index.php line number is 16 ;
     16 - $pathsPath = realpath(FCPATH . '../app/Config/Paths.php');

But not working for me. I get this error "404 - File Not Found Controller or its method is not found: \App\Controllers\Backend::index chould you help ? ". Chould you help me pls.

Best Regard and I'm sorry for my English.