Update - This really sucks. LiveNation's website now shows this as postponed, as well (though, oddly - you can still buy tickets
):
The Event Organizer has had to postpone your event.
Please hold onto
your tickets as they will be valid for the new date. You can locate your
tickets by signing in to your online account. If your event is eligible for a
refund or credit, those options will be visible within the Event Details of
your order.
Please see our Purchase Policy for more information.