Issue with EC 2021 T-shirt purchase

We are currently selling our EC 2021 T-shirts through the EC 2021 Online Store website.
We are currently experiencing some issues in regards to proceeding during checkout.
The technical team is looking into the issue and is trying to solve it as soon as possible.
We will be notifying you on the news page once the issue is resolved.
We apologize for the inconvenience caused and we thank you for your patience.
(July 16 23:00 JST)