Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Validation\ValidationRule" not found in /opt/lampp/htdocs/msjbooking/app/Rules/UnavailStatusCheckValidate.php:9 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjbooking/app/Rules/UnavailStatusCheckValidate.php on line 9