Fatal error: Uncaught Error: Class 'Opis\Closure\SerializableClosure' not found in /home/kingelearn/public_html/vendor/laravel/framework/src/Illuminate/Queue/SerializableClosure.php:7 Stack trace: #0 {main} thrown in /home/kingelearn/public_html/vendor/laravel/framework/src/Illuminate/Queue/SerializableClosure.php on line 7