Fatal error: Uncaught Error: Interface "League\Config\MutableConfigurationInterface" not found in C:\Xampp\www\0050467\ims-mobile\vendor_\league\config\src\ConfigurationBuilderInterface.php:19 Stack trace: #0 {main} thrown in C:\Xampp\www\0050467\ims-mobile\vendor_\league\config\src\ConfigurationBuilderInterface.php on line 19