title: Node-sass not compiling
body: <p>Trying to make css files from scss with node-sass.
  My package.json:</p>
  <pre><code> {
    &quot;name&quot;: &quot;hello-webpack&quot;,
    &quot;version&quot;: &quot;1.0.0&quot;,
    &quot;description&quot;: &quot;&quot;,
    &quot;main&quot;: &quot;index.js&quot;,
    &quot;scripts&quot;: {
      &quot;test&quot;: &quot;echo \&quot;Error: no test specified\&quot; &amp;&amp; exit 1&quot;,
      &quot;scss&quot;: &quot;node-sass -watch scss -o css&quot;
    },
    &quot;author&quot;: &quot;&quot;,
    &quot;license&quot;: &quot;ISC&quot;,
    &quot;devDependencies&quot;: {
      &quot;sass&quot;: &quot;^1.26.10&quot;,
      &quot;sass-loader&quot;: &quot;^9.0.3&quot;,
      &quot;webpack&quot;: &quot;^4.44.1&quot;,
      &quot;webpack-cli&quot;: &quot;^3.3.11&quot;
    },
    &quot;dependencies&quot;: {
      &quot;node-sass&quot;: &quot;^4.14.1&quot;
    }
  }
  </code></pre>
  <p>But when i try npm run scss i see this error:</p>
  <pre><code>&gt; node-sass -watch scss -o css
  
  internal/validators.js:120
      throw new ERR_INVALID_ARG_TYPE(name, 'string', value);
      ^
  
  TypeError [ERR_INVALID_ARG_TYPE]: The &quot;path&quot; argument must be of type string. Received undefined
      at validateString (internal/validators.js:120:11)
      at Object.extname (path.js:1229:5)
      at getOptions (/Users/mac/Documents/Website/node_modules/node-sass/bin/node-sass:192:40)
      at Object.&lt;anonymous&gt; (/Users/mac/Documents/Website/node_modules/node-sass/bin/node-sass:376:15)
      at Module._compile (internal/modules/cjs/loader.js:1137:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
      at Module.load (internal/modules/cjs/loader.js:985:32)
      at Function.Module._load (internal/modules/cjs/loader.js:878:14)
      at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
      at internal/main/run_main_module.js:17:47 {
    code: 'ERR_INVALID_ARG_TYPE'
  }
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! hello-webpack@1.0.0 scss: `node-sass -watch scss -o css`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the hello-webpack@1.0.0 scss 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!     /Users/mac/.npm/_logs/2020-08-20T14_02_52_371Z-debug.log
  </code></pre>
  <p>What's wrong with path? It's correct, i got directories scss &amp; css, and have some files in both.</p>