The following error message appears when starting Veeam Backup and Replication console:
Veeam Backup and Replication self-signed certificate gets expired in 11 months after installation. The certificate is renewed, but Veeam Backup Service still has information about the old one in cache, thus shows the error message.
Important! Please note that this process will automatically restart the Veeam Backup Service.
Ensure no Backup/Replication Jobs or Restores are running before applying these steps.
Current workaround is the manual generation of a new certificate (if a self-signed certificate is used) as described here.
If you use your own certificates, perform import of renewed certificate:
The issue is also going to be fixed in future releases.