Install PrimeReact and PrimeIcons:

First, make sure you have primereact and primeicons installed in your project.

If not, you can install them using npm or yarn:

npm install primereact primeicons
yarn add primereact primeicons

Import the CSS files: Import the necessary CSS files for PrimeReact and PrimeIcons in your index.js or App.js file.

import 'primereact/resources/themes/saga-blue/theme.css';
import 'primereact/resources/primereact.min.css';
import 'primeicons/primeicons.css';