Fatal error: Uncaught Error: Interface "Nexmo\Client\Callback\CallbackInterface" not found in /home/instituto/public_html/sapc/laravel/vendor/nexmo/client/src/Client/Callback/Callback.php:12 Stack trace: #0 {main} thrown in /home/instituto/public_html/sapc/laravel/vendor/nexmo/client/src/Client/Callback/Callback.php on line 12