Need help to figure out this SqlQueryNotificationService error.

I found every several minutes, sometimes one or twice in an hour, I still get a dozen error like below logged in SQL Log.  See the error is "You do not have permission to access the service". I found some articles on other errors, but nothing about this error.  I want to get more information on this, and a way to trace what is the permission about and which user doesn't have the permission.

Source  spid26s

Message
The query notification dialog on conversation handle '{E6FC299F-8BFE-DC11-A4E1-000D5670268E}.' closed due to the following error: '<?xml version="1.0"?><Error xmlns="http://schemas.microsoft.com/SQL/ServiceBroker/Error"><Code>-8494</Code><Description>You do not have permission to access the service &apos;SqlQueryNotificationService-9ff8b39d-90a8-45bc-83a7-23837920774d&apos;.</Description></Error>'.

thanks