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