mail_sni for dovecot and exim sni certificates

I followed this guide: https://www.directadmin.com/features.php?id=2019 but I still cannot get it working.
The task `echo "action=rewrite&value=mail_sni" >> /usr/local/directadmin/data/task.queue` does not add anything to /etc/virtual/snidomains nor to /etc/dovecot/conf/sni.

When I generate Let's Encrypt certificate in DA SSL page the /etc/virtual/snidomains is updated but the /etc/dovecot/conf/sni folder is still empty. Also I don't know if it is related but I noticed this error at the end of the output:

Cannot find the dovecot_sni.conf template.

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