我能够运行得非常好，然后通过npm安装了Popper，然后发生了问题!完整的错误日志如下:

[error] Error: NGCC failed. 
    at NgccProcessor.process (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\@ngtools\webpack\src\ngcc_processor.js:69:19) 
    at C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\@ngtools\webpack\src\angular_compiler_plugin.js:576:31 
    at SyncHook.eval [as call] (eval at create (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\tapable\lib\HookCodeFactory.js:19:10), <anonymous>:7:1) 
    at SyncHook.lazyCompileHook (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\tapable\lib\Hook.js:154:20) 
    at Object.webpack [as webpackFactory] (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\webpack\lib\webpack.js:55:30) 
    at createWebpack (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\@angular-devkit\build-webpack\src\webpack-dev-server\index.js:21:36) 
    at Object.runWebpackDevServer (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\@angular-devkit\build-webpack\src\webpack-dev-server\index.js:47:12) 
    at SwitchMapSubscriber.project (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\@angular-devkit\build-angular\src\dev-server\index.js:164:32) 
    at SwitchMapSubscriber._next (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\rxjs\internal\operators\switchMap.js:49:27) 
    at SwitchMapSubscriber.Subscriber.next (C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\rxjs\internal\Subscriber.js:66:18) 
    at C:\Users\alexm\source\repos\JordanSpencer.Ang.Web\JordanSpencer\node_modules\rxjs\internal\util\subscribeToPromise.js:7:24 
    at processTicksAndRejections (internal/process/task_queues.js:97:5) 

请您参考如下方法:

对我来说，它看起来像版本不匹配。我建议删除项目内的node_modules文件夹后重新安装
rm -rf node_modules
ng update @ angular/cli @ angular/core
我