Fatal error: Uncaught Error: Class "Vonage\Client\Credentials\AbstractCredentials" not found in /home/addup/public_html/panel/vendor/vonage/client-core/src/Client/Credentials/Basic.php:14 Stack trace: #0 {main} thrown in /home/addup/public_html/panel/vendor/vonage/client-core/src/Client/Credentials/Basic.php on line 14