This notice copied from Kobo Developer Team
As our databases keep growing rapidly, we need to move to update the server to accommodate future growth. This may take up to 90 minutes, during which this site will be unavailable. Please note that you will not be able to submit new records during this timeframe. However, if someone tries to submit data, it will remain stored safely on their device until it can be submitted again later. We will send updates on Twitter during this maintenance to confirm there when the site is live again. We apologise for any inconvenience caused.