Fatal error: Uncaught Error: Class "ElephantIO\Engine\SocketIO\Version1X" not found in /var/www/html/server/vendor/elephantio/elephant.io/src/Engine/SocketIO/Version4X.php:20 Stack trace: #0 {main} thrown in /var/www/html/server/vendor/elephantio/elephant.io/src/Engine/SocketIO/Version4X.php on line 20