Fatal error: Uncaught Error: Interface "Nexmo\Client\Callback\CallbackInterface" not found in /home/trombino/public_html/africa.trombino.org/vendor_new/nexmo/client/src/Client/Callback/Callback.php:12
Stack trace:
#0 {main}
thrown in /home/trombino/public_html/africa.trombino.org/vendor_new/nexmo/client/src/Client/Callback/Callback.php on line 12