OOP GUI Error: main.lua:4: attempt to index local (a boolean value)... Issue with modules - oop

Question

Today, I was messing around with trying to make a gui class for game I'd like to start making in LOVE2D. I decided to try and use OOP to make creating new menus easier in the future. The OOP works great until I try and put it into it's own module, where it gives me the error above. I've double and triple checked my code against similar code and I can't find the problem. I've also looked it up and there are similar threads, but nothing that helps my problem. Here is the relevant code...
From the main.lua
local gui = {
x = 0, y = 0,
width = 0, height = 0,
popupSpeed = 300,
active = false,
color = {red = 0, blue = 0, green = 0, alpha = 0},
menuType = "",
--buttons = require "Game/buttons"
}
And from the gui.lua...
local newGUI = require "Game/gui"
local menus = {
playerInv = newGUI.new()
}
function love.load()
menus.playerInv:createDropDown("right" , _, 30, 100, love.graphics.getHeight() - 60, 50, 128, 50, 255)
end
function gui.new()
newMenu = {}
for k, v in pairs(gui) do
newMenu[k] = v
end
return newMenu
end
function gui:createDropDown(direction, x, y, width, height, red, blue, green, alpha)
self.red = red
self.blue = blue
self.green = green
self.alpha = alpha
if direction == "right" then
self.x = love.graphics.getWidth() - width
self.y = y
self.width = width
self.height = height
self.menuType = "rightDropDown"
elseif direction == "left" then
self.x = 0
self.y = y
self.widthMax = width
self.height = height
self.menuType = "leftDropDown"
elseif direction == "down" then
self.x = x
self.y = y
self.width = width
self.heightMax = height
self.menuType = "regDropDown"
end
end
function gui:drawGui()
if self.active == true then
love.graphics.setColor(self.red, self.blue, self.green, self.alpha)
love.graphics.rectangle("fill", self.x, self.y, self.width, self.height, 10, 10, 6)
end
end

Answer 1

I'm assuming the first snippet is Game/gui and that the second part is main.lua, if this is so, You are attempting to call .new() function which is clearly absent on your Game/gui file. You need to move all of gui's functions to it's own file as well, this includes gui.new(), gui:createDropDown and gui:drawGui() last but not least, you have to return gui at the end of it's own file.
Your main file should end up somewhat like this:
local newGUI = require "Game/gui"
local menus = {
playerInv = newGUI.new()
}
function love.load()
menus.playerInv:createDropDown("right" , _, 30, 100, love.graphics.getHeight() - 60, 50, 128, 50, 255)
end
and Game/gui somewhat like this:
local gui = {} -- With all the stuff inside
function gui.new()
-- With all the stuff it had inside
end
function gui:createDropDown()
-- With all the stuff it had inside
end
function gui:drawGui()
-- With all the stuff it had inside
end
return gui
You see, you forgot to move its functions to its own file, and return gui itself. Don't forget to replace what i omitted on Game/gui!