Adding New CO Throws Redirect Error

Adding a new CO via /registry/cos/add adds the CO, but throws the following error:

Notice (8): Undefined index: redirect [APP/Controller/StandardController.php, line 685]
Code

function performRedirect() {
$redirect = $this->viewVars['redirect'];
StandardController::performRedirect() - APP/Controller/StandardController.php, line 685
StandardController::add() - APP/Controller/StandardController.php, line 100
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - CORE/Cake/Controller/Controller.php, line 473
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 104
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 86
[main] - APP/webroot/index.php, line 96
Notice (8): Undefined index: redirect [APP/Controller/StandardController.php, line 688]
Notice (8): Undefined index: redirect [APP/Controller/StandardController.php, line 689]