CKB:Https error messages occur
Https error messages (such as error message 135) occur when trying to use CS4N.
Https error messages (e.g.: 135) indicate that the Domino Server does not regard the SSL Certificate installed on the Cryptshare Server as trusted or the certificate is unknown.
You can find advice on how to resolve this issue in the section Add a self-created SSL certificate to the list of trusted certificates on the Domino Server (optional)