Newbie trying to update old tiny mod, help needed.

Hey, so, I really wanted to use this mod for showing all world rankings.
https://forums.civfanatics.com/threads/requested-mod-world-rankings.604968/

Sadly, its outdated. I tried what I could to fix it. This is as far as I got.

All the detailed tabs seems to work alright, tested with only 2 civs tho for now.
Cant get rid of these messages. Whenever I try to edit things I think are the right things, the button does not react (as the outdated mod would behave).

Could I get some assistance please?

(And yes I know there is a Mod Creation help part of forum, but I wanted to get a responce as fast as possible.)

Moderator Action: Welcome to CivFanatics. Moved your thread to Creation and Customization where you will receive more assistance. Good luck with your modding. leif