--- core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php.orig	2016-02-22 23:38:00.883941900 +0100
+++ core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php	2016-02-22 23:48:26.067941900 +0100
@@ -13,4 +13,5 @@
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\RedirectResponse;
 
 /**
@@ -221,7 +222,7 @@
           }
           // Set this one as the default authorize method.
-          $this->config('system.authorize')->set('filetransfer_default', $filetransfer_backend);
+          $this->configFactory()->getEditable('system.authorize')->set('filetransfer_default', $filetransfer_backend)->save();
           // Save the connection settings minus the password.
-          $this->config('system.authorize')->set('filetransfer_connection_settings_' . $filetransfer_backend, $connection_settings);
+          $this->configFactory()->getEditable('system.authorize')->set('filetransfer_connection_settings_' . $filetransfer_backend, $connection_settings)->save();
 
           $filetransfer = $this->getFiletransfer($filetransfer_backend, $form_connection_settings[$filetransfer_backend]);
@@ -229,5 +230,8 @@
           // Now run the operation.
           $response = $this->runOperation($filetransfer);
-          if ($response instanceof Response) {
+          if ($response instanceof RedirectResponse) {
+            $response->send();
+          }
+          elseif ($response instanceof Response) {
             $form_state->setResponse($response);
           }