Fatal error: Uncaught TypeError: Invalid return value: callable object expected, "null" returned from "C:/Apache24/htdocs/test-project-sym/vendor/autoload_runtime.php". in C:\Apache24\htdocs\test-project-sym\vendor\autoload_runtime.php:18 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\test-project-sym\vendor\autoload_runtime.php on line 18