Initial Navigation Issue

[junaid04]

I have received this message in crashlytics when setting up sidemenu as initial view controller
#15-[_UINavigationBarVisualProviderModernIOS _updateContentForTopItem:backItem:animated:]

and application is crashing here is my code.

                let sb = UIStoryboard(name: "Main", bundle: Bundle.main)
                let sideMenuVC = sb.instantiateViewController(withIdentifier: "FIFCustomSideMenuVC")
                self.window?.rootViewController = sideMenuVC
                self.window?.makeKeyAndVisible()