Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Events\Dispatcher" not found in /home/sustaina/public_html/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:20 Stack trace: #0 {main} thrown in /home/sustaina/public_html/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php on line 20