Some users report Error 2S129/2 when they try to validate their email. It looks like they click on the link in their email, get this error, then when I check them the account looks fine and activated. Any idea whey they would see this error?

The error code means that the validation URL has already been clicked. This can happen, for instance, with some email providers such as Sparkpost (because they have begun following the links in emails which essentially executes the validation routine before the user ever even receives the email).

I just received an email from someone who also stated they received this error code, stating they were unable to create an account, then tried to create another account and received the same error message.

If you submit a ticket, we can assist.