title: How to resolve an error: The sandbox is not in sync with the Podfile.lock
body: <p>When I add new plugin in Flutter, I get this error in my runner xcode:</p>
  <blockquote>
  <p>The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation</p>
  </blockquote>
  <p>and I have already install CocoaPods and updated. I tried to run pod install and not fixed it help please</p>