Error at Rikuu Ranking Dungeon (1 Stone Compensation)
Error fixed on 2/8 (Thu) at 1:25 pm.
Compensation distributing on 2/9 (Fri).
Details (JP): Bug notice
If you did the Rikuu ranking before 13:25 JST today, you will be given a Magic Stone as compensation.
The bug was with Uvo Zeus Vulcan in Rikuu Cup that crashed the app, when he used his cloud attack and it got blocked by the Cloud Resist super awakening.