Fatal error: Uncaught Error: Class "Symfony\Component\Translation\Loader\FileLoader" not found in C:\WebServer\htdocs\bookshelf\vendor\symfony\translation\Loader\MoFileLoader.php:19 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\symfony\translation\Loader\MoFileLoader.php on line 19