Fatal error: Uncaught Error: Interface "App\Contracts\Extension\UpgradeStepInterface" not found in C:\xampp\htdocs\gnu_7\g7\app\Extension\AbstractUpgradeStep.php:31 Stack trace: #0 {main} thrown in C:\xampp\htdocs\gnu_7\g7\app\Extension\AbstractUpgradeStep.php on line 31