Cannot perform Post-Handshake Authentication

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:


<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:

Details (like screenshots):

How I found the problem:

I’ve already tried: