Hello Tamers, This is DATS Center.

We have found a issue for the Arena has been closed on 2022.04.20 10:00 A.M.(KST)~2022.04.21 10:30 A.M.(KST) in Omega Server.
The current issue is fixed and we are going to send out compensation rewards in a near future.

We are sorry for the inconvenience and appreciate your understanding.

Thank you.
Best regards,