Created a custom mod, it's shows up in the mod panel, I can enable it, but it's not changing anything. What are the steps I need to take?

[BruceLover69]

I created a custom mod using a .lua file, it's supposed to change Robert the Bruce's original useless ability into one where all his cities turn ecstatic for 10 turns. In addition to this he gets +1 amenity to all his cities settled next to lakes. The .lua file works because the print I put in the file shows up in the lua.log. That's about all I know. The gameplay doesn't change and the charachter selection screen hasn't changed as well. What steps do I need to take to make sure I can get this piece of **** to work?

 

[bandit_heeler]

Make sure it has enabled "Affects saved games" and it is allowed to use in singleplayer and in multiplayer if you wish.
Next make sure it replaces the file you need and targets valid LUA context in modification configuration, in in-game actions.
To test the mod create a new game and then it's up to you how to obtain the great person. Personally I'm not sure how to but I guess you can use Fire Tuner.