Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\ContainerBuilder' not found in C:\xampp\htdocs\ITI\uvdesk\vendor\symfony\dependency-injection\Tests\Fixtures\containers\container13.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ITI\uvdesk\vendor\symfony\dependency-injection\Tests\Fixtures\containers\container13.php on line 6