Windows Hardware Lab Kit won't sign my package "Failed to create Signing Key"

[Oliver Ives]

I am trying to use HLK to create a package and using the certificate store. My certificate is an EV code signing certificate using a Yubikey.I have been able to successfully sign files with this certificate and Yubikey beforehand, I am only getting this issue with HLK Studio.Would anyone know why this is?Thanks,Olly.

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