title: external library (pod) showing errors after updating Xcode
body: <p><a href="https://i.stack.imgur.com/FNyJb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FNyJb.png" alt="enter image description here"></a></p>
  
  <p>I've updated Xcode to the latest and all these errors came. Then I downgraded my Xcode, but the errors still there.</p>