Decrypting SSL traffic

Hi guys,
I’m trying to inspect the web traffic sent by an application.
I use proxifier to run the traffic through mitmproxy, and mitmproxy does a formidable job passing it on, to where it’s supposed to go.
The only problem is, that I cannot see what the request or the response looked like.

I installed the certificates that came with mitmproxy.

I wonder if this could just be what is actually sent and returned? - It seems to decrypt other sites just fine (however just are visited by me directly in a browser).