Fatal error: Uncaught Error: Class "Vonage\Client\Credentials\AbstractCredentials" not found in /home/keshavvps/public_html/keshav/KG2/Shir/vendor/vonage/client-core/src/Client/Credentials/Keypair.php:28 Stack trace: #0 {main} thrown in /home/keshavvps/public_html/keshav/KG2/Shir/vendor/vonage/client-core/src/Client/Credentials/Keypair.php on line 28