Cannot perform Post-Handshake Authentication

Hi,
I am new user of postman so I am kind of missing some exp and points… so I need to ask… I am trying to make a calling PSD2 CISP in postman but got problem with SSL protocol I guess… Error:

<h1>Forbidden</h1>

<p>You don't have permission to access this resource.Reason: Cannot perform Post-Handshake Authentication.<br /></p>

I only have JaTTest202209.pem which has private key inside… But when I want to add certificate into postman I can only fill couple things:

Is this enought? How can I test that the certificated I add is working? some advices how to make it real?

My question:

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I’ve already tried: