I recently built my first iOS Application and wanted to release it on production. My release version works properly when Directly installed to iPhone from Xcode. Test Flight However when I Roll it out to production, it crashes when launching. Debug Options that I tried out: I checked the archive and made sure Build Config is on 'release' I checked the crash logs from the Organizer window, out of all the crashes only one Crash is logged ( I did check the Upload app symbols to receive symbolicated reports From apple when distributing the app to App store connect from Xcode) The only crash log message available was YourAppName: Swift runtime failure: Unexpectedly found nil while unwrapping an Optional value + 0 However the stack is empty and I couldn't locate the line where this occurs during launch, as the app works perfectly fine on simulator, direct install on real device and even on test flight. How do I proceed to debug and rectify this issue asap?