When issuing a Let's Encrypt certificate, the operation fails with the error message:
Could not issue a Let's Encrypt SSL/TLS certificate for domain.tld.
You might have specified an invalid email address.
Please specify a valid email address and request the SSL/TLS certificate again.
Detail: Error creating new account :: contact email "[email protected]" has invalid domain : Domain name does not end with a valid public suffix (TLD)
An invalid email address has been used for issuing a Let's Encrypt certificate.
Use a valid email address when issuing a Let's Encrypt certificate.