same here ! upgrade to v0.28 moved to cerbot for generating certificat but it need registration with an email address first that the miab update do not provide or let us insert !
email alert for generating certs:
Provisioning TLS certificates for ******.*****.mail, .maill, www..mail.
error: *********.*********.mail, *.mail, www..mail:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
You should register before running non-interactively, or provide --agree-tos and --email <email_address> flags.
Error in end of miab install script !