最近我收到了很多奇怪的错误信息,现在甚至无法启动app.js。以下错误信息意味着什么?有人知道如何解决吗?
node.js:201
throw e; // process.nextTick error, or 'error' event on first tick
^
TypeError: Cannot read property 'port' of null
at Object.<anonymous> (/Users/henrikpetersson81/node/last/test4/app.js:15:64)
at Module._compile (module.js:441:26)
at Object..js (module.js:459:10)
at Module.load (module.js:348:31)
at Function._load (module.js:308:12)
at Array.0 (module.js:479:10)
at EventEmitter._tickCallback (node.js:192:40)