Fatal error: Uncaught Error: Class "League\Config\Exception\InvalidConfigurationException" not found in D:\Webserver\Apache24\htdocs\laravel\basic\vendor\league\config\src\Exception\ValidationException.php:18 Stack trace: #0 {main} thrown in D:\Webserver\Apache24\htdocs\laravel\basic\vendor\league\config\src\Exception\ValidationException.php on line 18