Fatal error: Uncaught Error: Class "ElephantIO\Engine\SocketIO" not found in /var/www/html/server/vendor/elephantio/elephant.io/src/Engine/SocketIO/Version1X.php:33 Stack trace: #0 {main} thrown in /var/www/html/server/vendor/elephantio/elephant.io/src/Engine/SocketIO/Version1X.php on line 33