Unable to import certificate

[gunnywong]

I'm trying to set up an enrollment station and also getting the 'unable to import a certificate, return code YKPIV_GENERIC_ERROR' I've changed the template minimum key size to 1024 and still no dice. I can use the PIV Manager to generate keys but we want to use ES with an enrollment agent.

[Genbox]

Try version 0.3.5.3
What is the firmware version of the Yubikey you have?