Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /home/itscm/dev.its.cm/webserivesits/vendor/nelmio/api-doc-bundle/DependencyInjection/NelmioApiDocExtension.php:33 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/webserivesits/vendor/nelmio/api-doc-bundle/DependencyInjection/NelmioApiDocExtension.php on line 33