Fatal error: Uncaught Error: Class "Symfony\Component\Translation\Dumper\FileDumper" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\translation\Dumper\CsvFileDumper.php:21 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\translation\Dumper\CsvFileDumper.php on line 21