I have a `Tweetsheet` share option in my app. Just updated to iOS8.3 and now `SLComposeViewController` is throwing an error when I try to present the `Tweetsheet`: 

> 
> "Terminating app due to uncaught exception
>  'NSInvalidArgumentException', reason: 'Application tried to present a
>  nil modal view controller on target"
> 
> 
> 

```
SLComposeViewController *tweetSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
[tweetSheet setInitialText:@"testing!"];
[self presentViewController:tweetSheet animated:YES completion:nil];

```

I'm checking beforehand whether Twitter is available. Anyone else have this problem now?