editing the Sample character mod

[Meanator]

I have been trying to make some scripts or even changing the existing ones but when even I change anything that is not starting items or basic stats it causes the game to either not load my customized mod or tell me it won't work when I try to load it into a no world.
is there a way to find out what I am doing wrong in my coding and correct it outside of finding out it does not suddenly work. 
 

an example of what I tried to add didn't work and I am not sure why:
 

local function IsChestArmor(item)
    if item.components.armor and item.components.equippable.equipslot == EQUIPSLOTS.BODY then
    return true
    else
    return false
    end
    end

local old_Equip = inst.components.inventory.Equip
    inst.components.inventory.Equip = function(self, item, old_to_active) 
    if IsChestArmor(item) then self.inst.components.talker:Say("I can't wear this") return false end     
    return old_Equip(self, item, old_to_active) 
    end

Nanachi.zip

Edited October 5, 2020 by Meanator