Replacing the broadcast method with the one defined in the feed manager

app/workers/push_update_worker.rb

@@ -8,6 +8,6 @@ class PushUpdateWorker
     status = Status.find(status_id)
     message = inline_render(account, 'api/v1/statuses/show', status)
 
-    broadcast(account_id, type: 'update', timeline: timeline, message: message)
+    ActionCable.server.broadcast("timeline:#{account_id}", type: 'update', timeline: timeline, message: message)
   end
 end