Fatal error: Uncaught Error: Class "PhpMqtt\Client\PendingMessage" not found in C:\xampp\htdocs\sistema_piter\vendor\php-mqtt\client\src\PublishedMessage.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\sistema_piter\vendor\php-mqtt\client\src\PublishedMessage.php on line 13