Fatal error: Uncaught Error: Class 'Nelmio\ApiDocBundle\Describer\ExternalDocDescriber' not found in /home/users/00/3c/21/home/www/vendor/nelmio/api-doc-bundle/Describer/ApiPlatformDescriber.php:17 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/nelmio/api-doc-bundle/Describer/ApiPlatformDescriber.php on line 17