Fatal error: Uncaught Error: Interface "Nexmo\Entity\JsonSerializableInterface" not found in /home/trombino/public_html/sanctions.trombino.org/vendor_1/nexmo/client-core/src/Account/Balance.php:10 Stack trace: #0 {main} thrown in /home/trombino/public_html/sanctions.trombino.org/vendor_1/nexmo/client-core/src/Account/Balance.php on line 10