Fatal error: Uncaught Error: Interface 'Magento\Framework\Serialize\SerializerInterface' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/Serialize/Serializer/Base64Json.php:14 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/Serialize/Serializer/Base64Json.php on line 14