Module build failed: Error: ENOENT: no such file or directory, scandir ‘*node_modules/node-sass/vendor’
在laravel中，运行npm install，一切正常，但在运行npm run dev 时候报错，如下:
在错误中，我发现Module build failed: Error: ENOENT: no such file or directory, scandir ‘/home/wwwroot/default/laravel5.5/node_modules/node-sass/vendor’这句话，看到目录下确实没有这个文件夹，然后执行
npm rebuild node-sass npm run dev
然后再运行就可以，具体造成此问题的原因不知，再次运行 npm run dev 就可了。
ERROR in ./node_modules/css-loader?{"url":true,"sourceMap":false,"importLoaders":1}!./node_modules/postcss-loader/lib?{"sourceMap":true,"ident":"postcss","plugins":[null]}!./node_modules/resolve-url-loader?{"sourceMap":true,"root":"/home/wwwroot/default/laravel5.5/node_modules"}!./node_modules/sass-loader/lib/loader.js?{"precision":8,"outputStyle":"expanded","sourceMap":true}!./resources/assets/sass/app.scss
Module build failed: Error: ENOENT: no such file or directory, scandir '/home/wwwroot/default/laravel5.5/node_modules/node-sass/vendor'
at Object.fs.readdirSync (fs.js:904:18)
at Object.getInstalledBinaries (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/extensions.js:128:13)
at foundBinariesList (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/errors.js:20:15)
at foundBinaries (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/errors.js:15:5)
at Object.module.exports.missingBinary (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/errors.js:45:5)
at module.exports (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/binding.js:15:30)
at Object.<anonymous> (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/index.js:14:35)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/home/wwwroot/default/laravel5.5/node_modules/sass-loader/lib/loader.js:3:14)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:13:17)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:36:3)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
@ ./resources/assets/sass/app.scss 4:14-266
@ multi ./resources/assets/js/app.js ./resources/assets/sass/app.scss
ERROR in ./resources/assets/sass/app.scss
Module build failed: ModuleBuildError: Module build failed: Error: ENOENT: no such file or directory, scandir '/home/wwwroot/default/laravel5.5/node_modules/node-sass/vendor'
at Object.fs.readdirSync (fs.js:904:18)
at Object.getInstalledBinaries (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/extensions.js:128:13)
at foundBinariesList (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/errors.js:20:15)
at foundBinaries (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/errors.js:15:5)
at Object.module.exports.missingBinary (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/errors.js:45:5)
at module.exports (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/binding.js:15:30)
at Object.<anonymous> (/home/wwwroot/default/laravel5.5/node_modules/node-sass/lib/index.js:14:35)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/home/wwwroot/default/laravel5.5/node_modules/sass-loader/lib/loader.js:3:14)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:13:17)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:36:3)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:36:3)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:36:3)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at runLoaders (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/NormalModule.js:195:19)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:364:11
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:170:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:27:11)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:36:3)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:36:3)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:165:10)
at /home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:173:18
at loadLoader (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/loadLoader.js:36:3)
at iteratePitchingLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:169:2)
at runLoaders (/home/wwwroot/default/laravel5.5/node_modules/loader-runner/lib/LoaderRunner.js:362:2)
at NormalModule.doBuild (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/NormalModule.js:182:3)
at NormalModule.build (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/NormalModule.js:275:15)
at Compilation.buildModule (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/Compilation.js:151:10)
at moduleFactory.create (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/Compilation.js:456:10)
at factory (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/NormalModuleFactory.js:241:5)
at applyPluginsAsyncWaterfall (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/NormalModuleFactory.js:94:13)
at /home/wwwroot/default/laravel5.5/node_modules/tapable/lib/Tapable.js:268:11
at NormalModuleFactory.params.normalModuleFactory.plugin (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/CompatibilityPlugin.js:52:5)
at NormalModuleFactory.applyPluginsAsyncWaterfall (/home/wwwroot/default/laravel5.5/node_modules/tapable/lib/Tapable.js:272:13)
at resolver (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/NormalModuleFactory.js:69:10)
at process.nextTick (/home/wwwroot/default/laravel5.5/node_modules/webpack/lib/NormalModuleFactory.js:194:7)
at _combinedTickCallback (internal/process/next_tick.js:131:7)
at process._tickCallback (internal/process/next_tick.js:180:9)
@ ./resources/assets/sass/app.scss
@ multi ./resources/assets/js/app.js ./resources/assets/sass/app.scss
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! @ development: `cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the @ development 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! /root/.npm/_logs/2017-12-14T04_54_09_092Z-debug.log