When configuring a realm to use the Keygen feature, the workflow process is normal and states a certificate is delivered. However, in the Certificate store there are no certificates to be found.
This can be caused by either a problem with the client's browser, or a misconfiguration in the workflow.
Test to determine if this is limited to one end user, or multiple. If there are multiple users affected, it is likely to be a configuration issue. Ensure the workflow is set to "Certificate Enrollment Only" as Keygen does not support "Certificate Enrollment and Validation."
If the error only occurs for one user, check to see if the root and intermediate certificates are installed.