Fatal error: Uncaught TypeError: Invalid return value: callable object expected, "null" returned from "D:/xampp/htdocs/pimcore/my-project/vendor/autoload_runtime.php". in D:\xampp\htdocs\pimcore\my-project\vendor\autoload_runtime.php:12 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\autoload_runtime.php on line 12