Your certificate has been removed from your computer, you have tried to install your Digital ID Certificate unsuccessfully.
Sometimes replacing your certificate is the best way to correct errors. Replacing your certificate revokes your current certificate and issues a new certificate with the same validity period as your original certificate. This means that you will need to install the replacement certificate using instructions for your selected browser. You will receive new approval and password emails as well as an email notifying you that your current certificate has been revoked. Instructions on how to replace your certificate are as follows:
You will not be able to decrypt emails that were encrypted with the certificate that was revoked if it is not present on your system. There are no key recovery options for Digital ID Certificates for Secure Email, so please backup your Digital ID Certificates.
Instructions on installing your certificate are located here.