Fatal error: Uncaught RuntimeException: Failed to listen on "tcp://0.0.0.0:8080": Address already in use in /var/www/axelib.io/ws/vendor/react/socket/src/TcpServer.php:165 Stack trace: #0 /var/www/axelib.io/ws/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/axelib.io/ws/vendor/cboden/ratchet/src/Ratchet/Server/IoServer.php(59): React\Socket\Server->__construct('0.0.0.0:8080', Object(React\EventLoop\StreamSelectLoop)) #2 /var/www/axelib.io/ws/server.php(50): Ratchet\Server\IoServer::factory(Object(Ratchet\Http\HttpServer), 8080) #3 {main} thrown in /var/www/axelib.io/ws/vendor/react/socket/src/TcpServer.php on line 165