Fatal error: Uncaught InvalidArgumentException: Unable to unserialize value. Error: Syntax error in /var/www/html/vendor/magento/framework/Serialize/Serializer/Json.php:39 Stack trace: #0 /var/www/html/vendor/magento/framework/Interception/Config/CacheManager.php(69): Magento\Framework\Serialize\Serializer\Json->unserialize() #1 /var/www/html/vendor/magento/framework/Interception/Config/Config.php(118): Magento\Framework\Interception\Config\CacheManager->load() #2 /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(121): Magento\Framework\Interception\Config\Config->__construct() #3 /var/www/html/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(66): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject() #4 /var/www/html/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() #5 /var/www/html/vendor/magento/framework/App/ObjectManager/Environment/Developer.php(84): Magento\Framework\Ob in /var/www/html/vendor/magento/framework/Serialize/Serializer/Json.php on line 39