Fatal error: Uncaught Error: Class "Nexmo\Client\Credentials\AbstractCredentials" not found in C:\xampp\htdocs\OFFLINE\Uawa\laravel-version\laravel\vendor\nexmo\client\src\Client\Credentials\Keypair.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\OFFLINE\Uawa\laravel-version\laravel\vendor\nexmo\client\src\Client\Credentials\Keypair.php on line 16