title: After Removing App Extension Still Get App Installation Failed Error- This app contains an app extension with an illegal bundle identifier
body: <blockquote>
    <p>"This app contains an app extension with an illegal bundle identifier.
    App extension bundle identifiers must have a prefix consisting of
    their containing application's bundle identifier followed by a '.'."</p>
  </blockquote>
  
  <p>I used to create a widget extension in my project, after a while i deleted it, today I tried to run my app on my iPhone I got this error.</p>
  
  <p>It works well on simulator. And I try to install on other iPhones it also works well. I guess it is a physical device specific problem. I tried delete and reinstall the app and restart my device it did not work, and i checked again there is no extension target or any file in my project, I am still getting the same error.</p>