Footprinting Lab - Hard Certificate Issue

Losing my mind here. I’ve found the OpenSSH private key value, copy and pasted into a file on my system, changed the perms, and attempted to use to ssh, but I receive the following error message no matter what I do (Load key “./id_rsa”: error in libcrypto), rename to id_rsa, check file format to ensure there’s no BOM or anything (there isn’t). I did see reference to updating the ownership on the file, but what am I supposed to do? create a user on my system that matches the user I’m trying to SSH as so that I can change the owner of the file on my system to that? aghhhhh. Any help greatly appreciated.