Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Validation\Rule" not found in /home/airbuahc/public_html/website-subscription-management-system/app/Rules/ValidDiscountCode.php:8 Stack trace: #0 {main} thrown in /home/airbuahc/public_html/website-subscription-management-system/app/Rules/ValidDiscountCode.php on line 8