Fatal error: Uncaught Error: Class "Symfony\Component\Translation\Catalogue\AbstractOperation" not found in C:\AppServ\www\greenhess-storage\vendor\symfony\translation\Catalogue\MergeOperation.php:23 Stack trace: #0 {main} thrown in C:\AppServ\www\greenhess-storage\vendor\symfony\translation\Catalogue\MergeOperation.php on line 23