Fatal error: Uncaught Error: Class "Vonage\Client\Credentials\AbstractCredentials" not found in /home/sourceex/public_html/pm/vendor/vonage/client-core/src/Client/Credentials/OAuth.php:23 Stack trace: #0 {main} thrown in /home/sourceex/public_html/pm/vendor/vonage/client-core/src/Client/Credentials/OAuth.php on line 23