title: App crashes on button press signal:Sigbart
body: <p>I'm trying to build city guide app from template but I'm unable to switch from sections view to just map view. As I understand this error means that code isn't quite finished and its missing something. Would gladly appreciate if anyone could help me with this one.</p>
  
  <p><a href="https://i.stack.imgur.com/cUCMO.png" rel="nofollow noreferrer">https://i.stack.imgur.com/cUCMO.png</a></p>