Fatal error: Uncaught Error: Interface 'Psr\Container\ContainerInterface' not found in D:\xampp\htdocs\psp\backend\vendor\symfony\service-contracts\ServiceProviderInterface.php:22 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\symfony\service-contracts\ServiceProviderInterface.php on line 22