Fatal error: Uncaught Error: Class "PhpMqtt\Client\PendingMessage" not found in /home/roltechszq/addax/addax/vendor/php-mqtt/client/src/SubscribeRequest.php:12 Stack trace: #0 {main} thrown in /home/roltechszq/addax/addax/vendor/php-mqtt/client/src/SubscribeRequest.php on line 12