title: npm run build error when running "npm run build"
body: <p>Getting error when running <code>npm run build</code>:
  Can any one help me to fix this issue.</p>
  <p>Package.json file:</p>
  <pre class="lang-json prettyprint-override"><code>{
    &quot;name&quot;: &quot;confusion&quot;,
    &quot;version&quot;: &quot;1.0.0&quot;,
    &quot;description&quot;: &quot;This is a website for Ristorante Con Fusion&quot;,
    &quot;main&quot;: &quot;index.html&quot;,
    &quot;scripts&quot;: {
      &quot;start&quot;: &quot;npm run watch:all&quot;,
      &quot;test&quot;: &quot;echo \&quot;Error: no test specified\&quot; &amp;&amp; exit 1&quot;,
      &quot;lite&quot;: &quot;lite-server&quot;,
      &quot;scss&quot;: &quot;node-sass -o css/ css/&quot;,
      &quot;watch:scss&quot;: &quot;onchange \&quot;css/*.scss\&quot; -- npm run scss&quot;,
      &quot;watch:all&quot;: &quot;parallelshell \&quot;npm run watch:scss\&quot; \&quot;npm run lite\&quot;&quot;,
      &quot;clean&quot;: &quot;rimraf dist&quot;,
      &quot;copyfonts&quot;: &quot;copyfiles -f node_modules/font-awesome/fonts/* dist/fonts&quot;,
      &quot;imagemin&quot;: &quot;imagemin img/* --out-dir=dist/img&quot;,
      &quot;usemin&quot;: &quot;usemin contactus.html -d dist --htmlmin -o dist/contactus.html &amp;&amp; usemin aboutus.html -d dist --htmlmin -o dist/aboutus.html &amp;&amp; usemin index.html -d dist --htmlmin -o dist/index.html&quot;,
      &quot;build&quot;: &quot;npm run clean &amp;&amp; npm run imagemin &amp;&amp; npm run copyfonts &amp;&amp; npm run usemin&quot;
    },
    &quot;author&quot;: &quot;&quot;,
    &quot;license&quot;: &quot;ISC&quot;,
    &quot;devDependencies&quot;: {
      &quot;cssmin&quot;: &quot;^0.4.3&quot;,
      &quot;htmlmin&quot;: &quot;0.0.7&quot;,
      &quot;lite-server&quot;: &quot;^2.5.4&quot;,
      &quot;micromatch&quot;: &quot;^4.0.2&quot;,
      &quot;node-sass&quot;: &quot;^4.14.1&quot;,
      &quot;onchange&quot;: &quot;^3.3.0&quot;,
      &quot;parallelshell&quot;: &quot;^3.0.1&quot;,
      &quot;rimraf&quot;: &quot;^2.6.2&quot;,
      &quot;uglify-js&quot;: &quot;^3.11.6&quot;,
      &quot;usemin-cli&quot;: &quot;^0.6.0&quot;
    },
    &quot;dependencies&quot;: {
      &quot;bootstrap&quot;: &quot;^4.0.0&quot;,
      &quot;bootstrap-social&quot;: &quot;^5.1.1&quot;,
      &quot;font-awesome&quot;: &quot;^4.7.0&quot;,
      &quot;jquery&quot;: &quot;^3.3.1&quot;,
      &quot;popper.js&quot;: &quot;^1.12.9&quot;
    }
  }
  </code></pre>
  <p>ERROR</p>
  <pre class="lang-sh prettyprint-override"><code>PS I:\Projects\Bootstrtao-test&gt; npm run build
  
  &gt; confusion@1.0.0 build I:\Projects\Bootstrtao-test
  &gt; npm run clean &amp;&amp; npm run imagemin &amp;&amp; npm run copyfonts &amp;&amp; npm run usemin
  
  
  &gt; confusion@1.0.0 clean I:\Projects\Bootstrtao-test
  &gt; rimraf dist
  
  
  &gt; confusion@1.0.0 imagemin I:\Projects\Bootstrtao-test
  &gt; imagemin img/* --out-dir=dist/img
  
  4 images minified
  
  &gt; confusion@1.0.0 copyfonts I:\Projects\Bootstrtao-test
  &gt; copyfiles -f node_modules/font-awesome/fonts/* dist/fonts
  
  
  &gt; confusion@1.0.0 usemin I:\Projects\Bootstrtao-test
  &gt; usemin contactus.html -d dist --htmlmin -o dist/contactus.html &amp;&amp; usemin aboutus.html -d dist --htmlmin -o dist/aboutus.html &amp;&amp; usemin index.html -d dist --htmlmin -o dist/index.html
  
  I:\Projects\Bootstrtao-test\node_modules\usemin\lib\processBlocks.js:39
                          throw Error('Unsupport format: ' + block.type);
                          ^
  
  Error: Unsupport format: CSS
      at I:\Projects\Bootstrtao-test\node_modules\usemin\lib\processBlocks.js:39:10
      at Array.forEach (&lt;anonymous&gt;)
      at module.exports (I:\Projects\Bootstrtao-test\node_modules\usemin\lib\processBlocks.js:9:9)
      at usemin (I:\Projects\Bootstrtao-test\node_modules\usemin\usemin.js:27:42)
      at Object.&lt;anonymous&gt; (I:\Projects\Bootstrtao-test\node_modules\usemin-cli\index.js:52:12)
      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 Module.require (internal/modules/cjs/loader.js:952:19)
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! confusion@1.0.0 usemin: `usemin contactus.html -d dist --htmlmin -o dist/contactus.html &amp;&amp; usemin aboutus.html -d dist --htmlmin -o dist/aboutus.html &amp;&amp; usemin index.html -d dist --htmlmin -o dist/index.html`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the confusion@1.0.0 usemin 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!     C:\Users\PetrosBelachew\AppData\Roaming\npm-cache\_logs\2020-11-20T12_05_10_237Z-debug.log
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! confusion@1.0.0 build: `npm run clean &amp;&amp; npm run imagemin &amp;&amp; npm run copyfonts &amp;&amp; npm run usemin`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the confusion@1.0.0 build 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!     C:\Users\PetrosBelachew\AppData\Roaming\npm-cache\_logs\2020-11-20T12_05_10_452Z-debug.log
  
  </code></pre>
  <p>Any ideas on how to fix this?</p>