Fatal error: Uncaught Error: Class "Symfony\Component\Translation\Catalogue\AbstractOperation" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\translation\Catalogue\MergeOperation.php:25 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\translation\Catalogue\MergeOperation.php on line 25