not found css file in cakephp without rewrite module

not found css file in cakephp without rewrite module

I'm having a problem with CakePHP, the CSS is not found. When I view the
source code in my browser I can see the cake generic CSS link in the head
section. But when I click on it to see the actual source code, I get a 404
not found error.
i follow this actions:
uncommented
Configure::write('App.baseUrl', env('SCRIPT_NAME'));
in app/config/core.php , because rewrite module is disable.
delete .htaccess file from / and /app and /app/webroot.
run project.
php code in default is :
app/View/Layouts/default.ctp
echo $this->Html->css('cake.generic');
and its html code is:
<link rel="stylesheet" type="text/css"
href="/app/webroot/css/cake.generic.css" />
this file exist really, but when i click to
/app/webroot/css/cake.generic.css in source of browser code i face
404 Not Found
Is way?