Our school is hosting an intra programming contest. Some of my friends are trying to register for a contest. However, it is showing that there is a problem.
I tried registering another account myself and it is showing the same error. Please look into this matter. Thank you!
Thank you for reporting this issue. It has been fixed.
It seems this issue was related to showing error messages on this page (e.g. when trying to register with an email address that has already been used before). Registrations that didn’t trigger any error message were being processed successfully.