Fatal error: Uncaught Error: Class 'Nexmo\Client\Callback\Callback' not found in /home/flexinettek/public_html/vendor/nexmo/client/src/Voice/Message/Callback.php:13
Stack trace:
#0 {main}
thrown in /home/flexinettek/public_html/vendor/nexmo/client/src/Voice/Message/Callback.php on line 13