title: Yarn Start Command failed with exit code 1
body: <p>I create react app with create-react-app and install react-admin . when I want to start  development server with yarn start throw an error unhand-led 'error' event and say Command failed with exit code 1 
  I search a lot but nothing helped. See the error in the below image <a href="https://i.stack.imgur.com/L3iB2.png" rel="noreferrer"><img src="https://i.stack.imgur.com/L3iB2.png" alt="enter image description here"></a></p>