Fatal error: Uncaught Error: Class 'Symfony\Component\Translation\Dumper\FileDumper' not found in D:\xampp\htdocs\vendor\symfony\translation\Dumper\CsvFileDumper.php:21 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vendor\symfony\translation\Dumper\CsvFileDumper.php on line 21