search forum bug

Hi,the page show an error when i searched "brand resources" words(please see the attachment), after our research and found the error reason - there is a group data in result list, and this group is sub group of Administrators, so when normal permission user do search, they'll get this error, i think this is a bug of Telligent, how can i fix it?

By the way:
the error page URL is:,

Telligent Enterprise Version: