Group trows White Page Take 03

Hi Si team

The following groups throws a white page whilst not logged in:

http://finalbug.net/groups/item/17-learn-fcpx

I see:

Group Throws Error:
1 hour ago
Social Share

Other groups seem to be fine:

http://finalbug.net/groups/item/2-bug-all-members

http://finalbug.net/groups/item/18-learn-resolve

I had the exact same issue before here:

http://stackideas.com/forums/group-throws-white-page

http://stackideas.com/forums/group-throws-white-page-take-02

Please advise

Thanks

Paul