title: Xcode App crashing error "terminating with uncaught exception of type NSException"
body: <p>I'm trying to use Firebase to my app and the app keeps crashing.</p>
  
  <p>If I don't implement <code>FIRApp.configure()</code> the app runs fine as soon as I use it the app tends to crash.</p>
  
  <p>Is there a way to fix this problem?</p>
  
  <p>Also with this error message</p>
  
  <blockquote>
    <p>libc++abi.dylib: terminating with uncaught exception of type NSException</p>
  </blockquote>