Fatal error: Uncaught Error: Class 'PHPSocketIO\Debug' not found in /mnt/www/chatform/vendor/workerman/phpsocket.io/src/Event/Emitter.php:8 Stack trace: #0 /mnt/www/chatform/vendor/workerman/phpsocket.io/tests/emitter.php(4): PHPSocketIO\Event\Emitter->__construct() #1 {main} thrown in /mnt/www/chatform/vendor/workerman/phpsocket.io/src/Event/Emitter.php on line 8