error on http://localhost/dslblog/

[araneta]

I got this error when opening http://localhost/dslblog/ after installation : composer install
Undefined index: domain
open: /home/aldo/projects/simpeg/apps/dslblog/vendor/laravel/framework/src/Illuminate/Cookie/CookieServiceProvider.php

{
$this->app['cookie'] = $this->app->share(function($app)
{
$cookies = new CookieJar($app['request'], $app['encrypter']);
 
$config = $app['config']['session'];
 
return $cookies->setDefaultPathAndDomain($config['path'], $config['domain']);
});
}