- Plesk Onyx for Linux
- Plesk for Linux
- Automatic Let's Encrypt Certificate renewal for securing Plesk fails and following error message can be found in
# egrep "ILLEGAL_ARGUMENT" /var/log/plesk/panel.log
ERR [extension/letsencrypt] Failed to renew Panel certificate: idn_to_ascii: empty domain name: U_ILLEGAL_ARGUMENT_ERROR.
- Renewing manually Let's Encrypt Certificate for securing Plesk going to Tools & Settings > SSL/TLS Certificates > Let's Encrypt > Renew works successfully.
Let's Encrypt extension bug with ID EXTLETSENC-573. A fix will become available in upcoming Let's Encrypt extension updates.
As a workaround, issue manually a Let's Encrypt Certificate for securing Plesk according to the instructions provided in following KB articles: