title: XCode doesn't run and doesn't show output
body: <p>I created a simple playground in Xcode 12. When I run below code, nothing shows in the console.</p>
  <pre><code>import UIKit
  
  var greeting = &quot;Hello, playground&quot;
  print(greeting)
  </code></pre>
  <p>This is the default playground, I just printed the variable. There're no errors nor warnings. It was working 2 days ago, but suddenly it stopped outputting.</p>
  <p>I also activated console from <strong>file &gt; View &gt; Debug Area &gt; Activate Console</strong>.</p>
  <p>Can you help me fix it? thank you in advance.</p>
  <p>Edit:
  Added Screenshot
  <a href="https://i.stack.imgur.com/1wALp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1wALp.png" alt="enter image description here" /></a></p>