title: Cannot resolve symbol SpringApplication
body: <p>Hi I've created a new spring boot project via intelliJ's Spring initializr</p>
  
  <p>Here is my screenshot:</p>
  
  <p><a href="https://i.stack.imgur.com/D9p64.png" rel="noreferrer"><img src="https://i.stack.imgur.com/D9p64.png" alt="enter image description here"></a></p>
  
  <p>It seems something wrong, I've tried "invalid caches and restart", but it doesn't work.</p>
  
  <p><a href="https://i.stack.imgur.com/fMAT7.png" rel="noreferrer"><img src="https://i.stack.imgur.com/fMAT7.png" alt="enter image description here"></a></p>