[Plugin: Events Manager] Broken Link on Month selector at Calendar widget

Hi,

When I click the Month selector (>>) on Calendar widget it redirect to our front page displayed inside the widget.
It only happens on “Groups” front page only. Other pages (/activity, /members, etc.) is fine.

You can check on my site here:
http://emelci.or.id/groups/

Why?

Thanks,
[bayu]

http://wordpress.org/extend/plugins/events-manager/