Fatal error: Uncaught Error: Class "Vonage\Client\Response\AbstractResponse" not found in /home/demoweb/public_html/placementship-backend/vendor/nexmo/client-core/src/Client/Response/Response.php:20 Stack trace: #0 {main} thrown in /home/demoweb/public_html/placementship-backend/vendor/nexmo/client-core/src/Client/Response/Response.php on line 20