Frozen Ever After at Disneyland Paris will be closed from September 13 through September 24, 2027. The closure is scheduled for 12 days.
No reason or planned work is included in the closure notice. It also does not give a reopening date.
Frozen Ever After is a boat ride through Arendelle in World of Frozen at Disney Adventure World. Its scenes include Troll Valley, the North Mountain, Elsa's Ice Palace and a finale with Anna, Elsa and Olaf.
Source: Disneyland Paris.