Fatal error: Uncaught Error: Interface 'Nexmo\Entity\JsonSerializableInterface' not found in C:\xampp\htdocs\com.arbokcorp.app\vendor\nexmo\client\src\Call\Talk.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\com.arbokcorp.app\vendor\nexmo\client\src\Call\Talk.php on line 21