运行node项目报错

PS D:\LearningHeavy\Web project\blog> npm start

> blog@0.0.0 start D:\LearningHeavy\Web project\blog

> node ./bin/www

D:\blog\node_modules\express\lib\application.js:295

throw new Error('callback function required');

Error: callback function required

at EventEmitter.engine (D:\LearningHeavy\Web project\blog\node_modules\express\lib\application.js:295:11)

at Object.<anonymous> (D:\LearningHeavy\Web project\blog\app.js:16:5)

at Module._compile (module.js:570:32)

at Object.Module._extensions..js (module.js:579:10)

at Module.load (module.js:487:32)

at tryModuleLoad (module.js:446:12)

at Function.Module._load (module.js:438:3)

at Module.require (module.js:497:17)

at require (internal/module.js:20:19)

at Object.<anonymous> (D:\LearningHeavy\Web project\blog\bin\www:7:11)

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! blog@0.0.0 start: `node ./bin/www`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the blog@0.0.0 start script.

npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:

npm ERR! C:\Users\Voter\AppData\Roaming\npm-cache\_logs\2017-10-18T07_54_23_831Z-debug.log

Vol_蒲公英

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