Fatal error: Uncaught Error: Class "Symfony\Component\Translation\Dumper\FileDumper" not found in C:\www\Apache24\htdocs\agenda-dif\vendor\symfony\translation\Dumper\PhpFileDumper.php:21 Stack trace: #0 {main} thrown in C:\www\Apache24\htdocs\agenda-dif\vendor\symfony\translation\Dumper\PhpFileDumper.php on line 21