Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/roltechszq/addax/addax/vendor/php-mqtt/client/tests/TestCase.php:12 Stack trace: #0 {main} thrown in /home/roltechszq/addax/addax/vendor/php-mqtt/client/tests/TestCase.php on line 12