2018-09-03 20:18:01.276518-0400 DemoApp[3201:585828] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard (<UIStoryboard: 0x283e21280>) doesn't contain a view controller with identifier 'unitySplashStoryboard''

[aiursrage2k]

2018-09-03 20:18:01.276518-0400 DemoApp[3201:585828] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard (<UIStoryboard: 0x283e21280>) doesn't contain a view controller with identifier 'unitySplashStoryboard''

[nominedisorder]

Due to a bug in the Unity export, you have to update a function in this class /Classes/UI/SplashScreen.mm:

void ShowSplashScreen(UIWindow* window)
{
    bool hasStoryboard = [[NSBundle mainBundle] pathForResource: @"LaunchScreen" ofType: @"storyboardc"] != nullptr;

    if (hasStoryboard)
    {
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName: @"LaunchScreen" bundle: [NSBundle mainBundle]];
        //_controller = [storyboard instantiateViewControllerWithIdentifier: @"unitySplashStoryboard"];
        
        _controller = [storyboard instantiateInitialViewController];
        window.rootViewController = _controller;
    }
    else
    {
        _controller = [[SplashScreenController alloc] init];
        [_controller create: window];
    }

    //[_controller create: window];
    [window makeKeyAndVisible];
}

[nominedisorder]

I added a Pull Request to fix this issue: #102
Hopefully the admin has time to review soon.

[jiulongw]

#104 merged which should handle this issue. Please have a try and re-open if it is still not working.