PHP Fatal error: Uncaught Error: Class ‘\Elasticsearch\Serializers\SmartSerializer‘ not found in /h

 类文件存在，但提示加载不到 “Elasticsearch\Serializers\SmartSerializer”

PHP Fatal error:  Uncaught Error: Class '\Elasticsearch\Serializers\SmartSerializer' not found in /home/wwwroot/es-task/vendor/elasticsearch/src/Elasticsearch/ClientBuilder.php:488

直接找到没有加载的类。使用require_once "类名路径"；