小编Rad*_*jev的帖子

我已经在工作的Windows上安装了开发人员模式，并且在安装一些运行项目所需的程序/功能时遇到很多问题。问题之一是当我运行composer install或composer install --no-plugins --no-scripts时，总是会出现此错误。

    Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for dompdf/dompdf v0.8.2 -> satisfiable by dompdf/dompdf[v0.8.2].
    - dompdf/dompdf v0.8.2 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
  Problem 2
    - Installation request for erusev/parsedown 1.7.1 -> satisfiable by erusev/parsedown[1.7.1].
    - erusev/parsedown 1.7.1 requires ext-mbstring * -> the requested …

那里！我从themeforest购买了一些模板，预览版一切正常，但使用新版时出现错误，例如

> TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type
> string. Received type undefined
>         at validateString (internal/validators.js:125:11)
>         at Object.join (path.js:427:7)
>         at noopServiceWorkerMiddleware (C:\Users\Rade\Desktop\gComet-master\node_modules\react-dev-utils\noopServiceWorkerMiddleware.js:14:26)
>         at Layer.handle [as handle_request] (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\layer.js:95:5)
>         at trim_prefix (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:317:13)
>         at C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:284:7
>         at Function.process_params (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:335:12)
>         at next (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:275:10)
>         at launchEditorMiddleware (C:\Users\Rade\Desktop\gComet-master\node_modules\react-dev-utils\errorOverlayMiddleware.js:20:7)
>         at Layer.handle [as handle_request] (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\layer.js:95:5)
>         at trim_prefix (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:317:13)
>         at C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:284:7
>         at Function.process_params (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:335:12)
>         at next (C:\Users\Rade\Desktop\gComet-master\node_modules\express\lib\router\index.js:275:10)
>         at handleWebpackInternalMiddleware (C:\Users\Rade\Desktop\gComet-master\node_modules\react-dev-utils\evalSourceMapMiddleware.js:42:7)
>         at …