Fatal error: Uncaught Error: Class "Vonage\Client\Credentials\AbstractCredentials" not found in /home/digitalproduct/public_html/projectmanagementsoftware/vendor/vonage/client-core/src/Client/Credentials/Container.php:19 Stack trace: #0 {main} thrown in /home/digitalproduct/public_html/projectmanagementsoftware/vendor/vonage/client-core/src/Client/Credentials/Container.php on line 19