title: Error : vue-loader requires @vue/compiler-sfc to be present in the dependency tree
body: <p>I'm getting this error when I'm trying to do</p>
  <pre><code>npm run serve
  </code></pre>
  <p>I have tried <code>npm update</code> <code>sudo npm serve</code>. It didn't work.
  I also tried deleting the package-lock.json file and doing <code>npm install</code> after that, and that too didn't work. I also downgraded the version of the vue-loader to 15.9.2 and that also didn't work</p>