Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\File\File" not found in /home/vincent/http/concrete5/concrete/vendor/symfony/http-foundation/File/UploadedFile.php:25 Stack trace: #0 {main} thrown in /home/vincent/http/concrete5/concrete/vendor/symfony/http-foundation/File/UploadedFile.php on line 25