According to the announcement on 15 June 2021 regarding maintenance of Bitkub Coin (KUB) deposit and withdrawal, we are glad to inform you that the system enhancement is completed and back online.

Schedule
Issue Bitkub Coin (KUB) Deposit and Withdrawal Back in Service
Date  16 June 2021
From 12:40 AM

We apologize for the inconvenience and thank you for your kind understanding and patience.