Ever faced an error like “unable to unserialize value” while working with system configuration in Magento 2.2 admin panel? It is because of the \Magento\Framework\Serialize\Serializer\Json class. The file vendor/magento/framework/Serialize/Serializer/Json.php is causing the problem. The function unserialize($string) returns an exception if the string is already serialized. Solution for “Unable to Unserialize Value” in Magento 2.2: Open vendor/magento/framework/Serialize/Serializer/Json.php file. […]
