Fatal error: Uncaught RuntimeException: Failed to listen on "tcp://0.0.0.0:8282": Address already in use in /var/www/html/api/app_old/chat/socket/vendor/react/socket/src/TcpServer.php:164 Stack trace: #0 /var/www/html/api/app_old/chat/socket/vendor/react/socket/src/Server.php(36): React\Socket\TcpServer->__construct('tcp://0.0.0.0:8...', Object(React\EventLoop\StreamSelectLoop), Array) #1 /var/www/html/api/app_old/chat/socket/vendor/cboden/ratchet/src/Ratchet/Server/IoServer.php(59): React\Socket\Server->__construct('0.0.0.0:8282', Object(React\EventLoop\StreamSelectLoop)) #2 /var/www/html/api/app_old/chat/socket/chat-server.php(15): Ratchet\Server\IoServer::factory(Object(Ratchet\Http\HttpServer), 8282) #3 {main} thrown in /var/www/html/api/app_old/chat/socket/vendor/react/socket/src/TcpServer.php on line 164