Fatal error: Uncaught Error: Interface 'Vonage\Entity\JsonSerializableInterface' not found in /home/clademy/lms.clademy.com/vendor/vonage/client-core/src/Account/Balance.php:29 Stack trace: #0 {main} thrown in /home/clademy/lms.clademy.com/vendor/vonage/client-core/src/Account/Balance.php on line 29