Fatal error: Uncaught Error: Interface "League\Config\MutableConfigurationInterface" not found in C:\xampp\htdocs\slip\laravel-webhooks\vendor\league\config\src\ConfigurationBuilderInterface.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\slip\laravel-webhooks\vendor\league\config\src\ConfigurationBuilderInterface.php on line 19