User can't confirm changed email

Same issue here.

A user reported this error to me 13 days ago and I thought it was an error specific to this user.

I changed this email by following this guide:

Today another user reported the same issue. So I think there is a more general problem with the email change.

Installation details:

  • Discourse 2.4.0.beta9
  • Droplet in Digital Ocean with 2GB RAM, 25 GB SSD.

Thanks in advance.