Fix notification error

extensions/sticky/src/Listeners/AddApiAttributes.php

@@ -21,6 +21,7 @@ class AddApiAttributes
             $event->attributes['canSticky'] = (bool) $event->model->can($event->actor, 'sticky');
         }
     }
+
     public function includeStartPost(BuildApiAction $event)
     {
         if ($event->action instanceof DiscussionsIndexAction) {

extensions/sticky/src/Notifications/DiscussionStickiedBlueprint.php

@@ -1,5 +1,6 @@
 <?php namespace Flarum\Sticky\Notifications;
 
+use Flarum\Sticky\Posts\DiscussionStickiedPost;
 use Flarum\Core\Notifications\Blueprint;
 
 class DiscussionStickiedBlueprint implements Blueprint