Resolving problems in XCode 7 crash reporter

I recently released the 2.0 version of my app. https://itunes.apple.com/app/neo-virtual-reality-for-reddit/id1013650716

I have users reporting that the app crashes but I can't figure out what to do in XCode. When I open a crash in the project it does not show me anything where the crash occured. See the screenshot attached for more information:

How can I solve my crashes in the future?

Edit: Bitcode is enabled and app symbols are included

If you do enable the Bitcode and having this issue, simply click the " Download dSYMs" button in the Organizer and try again.

Refer to the Apple Technical Note,

Because the final compilation of your binary occurs on the App Store, your Mac will not contain the debug symbol (dSYM) files needed to symbolicate crash reports received from App Review or from users who have sent you crash reports from their devices. Although a dSYM file is produced when you archive your application, it is for the bitcode binary and can not be used to symbolicate crash reports. The App Store makes the dSYM files generated during bitcode compilation available for you to download, from Xcode or from the iTunes Connect website. You must download these dSYM files in order to symbolicate crash reports received from App Review or from users who have sent you crash reports from their devices.