Fatal error: Uncaught Error: Interface 'JsonSerializable' not found in /home/edomesoft/public_html/pos/umpos/vendor/symfony/debug/Exception/SilencedErrorContext.php:19 Stack trace: #0 {main} thrown in /home/edomesoft/public_html/pos/umpos/vendor/symfony/debug/Exception/SilencedErrorContext.php on line 19