After 10 hour maintenance on 10/29 (Mon) 8:00pm - 10/30 (Tue) 6:00am JST
Updated 10/30: Side notes added about Coin dungeons moving to Special Dungeons.
… Coming at the end of October (with a planned maintenance) is removal of coin dungeons and challenge mode from the game!!…
Selected coin dungeons had an error that was fixed yesterday (6/20) at 10:50am.…