I have just started using vShare 2.5 in http://www.ikastube.com and I have an error in th GROUP link. When I clik on the Group link this error appears:

Not Found
The requested URL /groups/featured/1 was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Does anybody know how to fix it? I don't see where to create a group, not in the admin area, neither as a user. Thanking you in advance.