title: How to get crash logs of Testflight external testers on Xcode or iTunes connect?
body: <p>Is there any ways to know what's wrong with someone's app. It is working on everyone else's device but this person.</p>
  
  <p>The person tried removing the previous version and installing the new one, but it still does not work. I suspect that one of the files that I place in the documents folder might still be there... but the format of this file has changed since...</p>