Unfortunately, there’s an issue with sending account verification emails from our server right now. We’re looking into this, but will need a little bit of time to get this resolved, so please be patient if you’re just trying to sign up with a new account. We’ll add to/comment on this post here with updates as we have them.
Florian
This issue has now been resolved, so new activation emails should be going out again at sign-up, and can be resent under account profile (click on username on top right) on the farm interface.