Fatal error: Uncaught Error: Class 'PhpMqtt\Client\PendingMessage' not found in /home/diligence/public_html/connect/vendor/php-mqtt/client/src/UnsubscribeRequest.php:12 Stack trace: #0 {main} thrown in /home/diligence/public_html/connect/vendor/php-mqtt/client/src/UnsubscribeRequest.php on line 12