Fatal error: Uncaught Error: Class 'Vonage\Client\Credentials\Handler\AbstractHandler' not found in /home/digitalproduct/public_html/onlinejobportal/vendor/vonage/client-core/src/Client/Credentials/Handler/SignatureBodyHandler.php:10 Stack trace: #0 {main} thrown in /home/digitalproduct/public_html/onlinejobportal/vendor/vonage/client-core/src/Client/Credentials/Handler/SignatureBodyHandler.php on line 10