Fatal error: Uncaught Error: Interface "Laravel\SerializableClosure\Contracts\Serializable" not found in /home/v2appclykk/public_html/mail_manager/vendor/laravel/serializable-closure/src/Serializers/Signed.php:9 Stack trace: #0 {main} thrown in /home/v2appclykk/public_html/mail_manager/vendor/laravel/serializable-closure/src/Serializers/Signed.php on line 9