diff --git a/app/models/recommender_service.rb b/app/models/recommender_service.rb
index efca7d476..3a7bf4395 100644
--- a/app/models/recommender_service.rb
+++ b/app/models/recommender_service.rb
@@ -46,6 +46,9 @@ module RecommenderService
       )
       JSON.parse(resp.body)
     end
+    if ids == "error"
+      return []
+    end
     Post.find(ids.reject {|x| x[0] == post_id}.map(&:first))
   end