Buttons in oauth2 controller not active

[matrejek]

I use iOS version from Cocoapods: 'GTMOAuth2', '~> 1.1.0'

The following code is used for showing the view:

• (void)requestAuthorizationFrom:(UIViewController*) vc { [vc presentViewController:[self createAuthController] animated:YES completion:nil]; }
• (GTMOAuth2ViewControllerTouch )createAuthController { GTMOAuth2ViewControllerTouch authController; NSArray *scopes = [NSArray arrayWithObjects:kGTLAuthScopeDrive, kGTLAuthScopeDriveFile, kGTLAuthScopeDriveMetadata, nil]; authController = [[GTMOAuth2ViewControllerTouch alloc] initWithScope:[scopes componentsJoinedByString:@" "] clientID:@"XXXXX.apps.googleusercontent.com" clientSecret:nil keychainItemName:@"ur" delegate:self finishedSelector:@selector(viewController:finishedWithAuth:error:)]; return authController; }

As a result I have controller, I can provide credentials but on screen with permissions I get both buttons greyed-out and not active.

I would be grateful for help