Thanks for reporting this. I tested it and it does appear to be an issue. When I go to the invalid page it returns a 403 message. Therefore I have filed a bug for the issue JIVE-68040. If you would like to be notified when the bug is resolved, please open a support case in your private group provide the bug ID. This will allow us to update the bug with your company details and also allow us to notify you when it has been resolved by engineering.