Can't register on openbenchmarking.org - "An unknown error occurred."

[lockedout]

EDIT: NEVERMIND - IT SUDDENLY WORKED! Feel free to delete this thread.

Title says it all. I'm trying to register an account on openbenchmarking.org, but it fails with the helpful message "An unknown error occured."

This happens in both Firefox and Chromium, on Arch Linux. I've tried disabling adblocker and tried various unique usernames, with no success.

Thanks for any help!