- Plesk for Linux
Let's Encrypt fails to renew a certificate for Plesk:
PLESK_ERROR: Error: Could not issue a Let's Encrypt SSL/TLS certificate for example.com. Authorization for the domain failed.
Details: Fetching https://example.com:8443/.well-known/acme-challenge/44DVtYx2WBKaujKCYO7tOxZ4nS2-m_-Ci5dLoQw0X34: Invalid port in redirect target. Only ports 80 and 443 are supported, not 8443
A custom Redirect from port 80\443 to 8443 is enabled on the server for the server hostname.
A custom redirect prevents Let's Encrypt from completing the challenge.
Disable the redirect and launch the renewal again.