Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\ContainerBuilder' not found in C:\xampp\htdocs\ITI\uvdesk\vendor\symfony\dependency-injection\Tests\Fixtures\containers\container_uninitialized_ref.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ITI\uvdesk\vendor\symfony\dependency-injection\Tests\Fixtures\containers\container_uninitialized_ref.php on line 8