title: How to install Functional Icons after version React.js >= 16.8.0
body: <p>I want to install UI material icons from: <a href="https://v4.mui.com/getting-started/installation/" rel="nofollow noreferrer">https://v4.mui.com/getting-started/installation/</a></p>
  <p>It says: &quot;Please note that react &gt;= 16.8.0 and react-dom &gt;= 16.8.0 are peer dependencies.&quot;
  For the installation.</p>
  <p>I experienced that <code>npm install @material-ui/core</code> and <code>npm install @material-ui/icons</code></p>
  <p>Results in the error messages, what happened after version 16.8.0 of React.js? And how to install?</p>
  <p>Thank you in advance.</p>
  <p>Some extra info on me:
  I am learning to code atm. I would like to build something front and back-end.
  Learn JS and learn to work with a database. Following allong a tutorial to get the 'feel' for it and how to work with the MERN stack.</p>