来自AWS服务器的Node.js端口连接完全关闭

Question

突然Node.js在端口4201上的工作与AWS服务器完全断开。

ERROR : Could not get any response
and also got NPM ERROR

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! cricketapi-websocket@1.0.0 dev: `node index.js "index.js"`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the cricketapi-websocket@1.0.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional log                                                                                                                                                             ging output above.

我正在使用Pm2启动，但服务器未启动。