title: Yarn start - Command failed with exit code 1
body: <p>I'm having a little problem while trying to run &quot;Yarn start&quot; in my ReactJS project.
  The error is pasted below:</p>
  <pre><code>yarn run v1.22.5
  $ webpack-dev-server --mode development
  The CLI moved into a separate package: webpack-cli
  Please install 'webpack-cli' in addition to webpack itself to use the CLI
  -&gt; When using npm: npm i -D webpack-cli
  -&gt; When using yarn: yarn add -D webpack-cli
  internal/modules/cjs/loader.js:883
    throw err;
    ^
  
  Error: Cannot find module 'webpack-cli/bin/config-yargs'
  Require stack:
  - C:\3AM\web\node_modules\webpack-dev-server\bin\webpack-dev-server.js
      at Function.Module._resolveFilename (internal/modules/cjs/loader.js:880:15)
      at Function.Module._load (internal/modules/cjs/loader.js:725:27)
      at Module.require (internal/modules/cjs/loader.js:952:19)
      at require (internal/modules/cjs/helpers.js:88:18)
      at Object.&lt;anonymous&gt; (C:\3AM\web\node_modules\webpack-dev-server\bin\webpack-dev-server.js:65:1)
      at Module._compile (internal/modules/cjs/loader.js:1063:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
      at Module.load (internal/modules/cjs/loader.js:928:32)
      at Function.Module._load (internal/modules/cjs/loader.js:769:14)
      at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12) {
    code: 'MODULE_NOT_FOUND',
    requireStack: [
      'C:\\3AM\\web\\node_modules\\webpack-dev-server\\bin\\webpack-dev-server.js'
    ]
  }
  error Command failed with exit code 1.
  info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
  </code></pre>
  <p>I've tried to install webpack-dev-server with npm and yarn, but it didn't solve.</p>