iOS FBDialog crashes after clicking on Post <p>I am trying to create a share dialog to post on Facebook the user action. To do that I use this code:</p> <pre><code>id&lt;FBGraphObject&gt; fbObject = [FBGraphObject openGraphObjectForPostWithType:@"namespace:action" title:@"Titolo" image:imageURL url:URL description:@"descrizione"]; id&lt;FBOpenGraphAction&gt; action = (id&lt;FBOpenGraphAction&gt;)[FBGraphObject graphObject]; [action setObject:fbObject forKey:@"samplename"]; [FBDialogs presentShareDialogWithOpenGraphAction:action actionType:@"namespace:action" previewPropertyName:@"samplename" handler:^(FBAppCall *call, NSDictionary *results, NSError *error) { if(error) { NSLog(@"Error: %@", error.description); } else { NSLog(@"Success"); } }]; </code></pre> <p>The fbdialog is correctly displayed, but when I click on "Post" to complete the posting, the progress bar on facebook stops and I am redirected again to my app, so it fails the posting.</p> <p>Everything works fine by posting with the Graph API Explorer but I am not able to do that from the app.</p>