Error 500 on a plesk driven server

[MattCage]

I'm trying to install cgi-node on an Apache server driven by Plesk admin and, after many different errors and issues, now I can only see an Error 500: "Premature end of script headers: cgi-node.js " when tyring tu run cgiNodeInfo.
I followed every hint suggested in previous issues in this git (session path hack, upgrade to the latest files from the repo, etc.) but nothing seems to work.
How can I solve this? Please tell me if you need blocks of code or whatever you need to post. :)