Why wont this script allow me to change a value?

I am trying to give a player a choice to Accept or Decline a quest through the use of a GUI that starts off invisible

I am using a ModuleScript that is inside of an NPC within a folder within Workspace. e.g. game.Workspace.Folder.NPCModel.ModuleScript

I'm also using a LocalScript within a ScreenGUI inside of StarterGUI e.g. game.StarterGui.ScreenGUI.LocalScript

The LocalScript works perfectly and its purpose is to look at the ModuleScript and use the text within it as the text that goes inside of a TextLabel. The TextLabel is inside of a frame with the same parent as the LocalScript.

When I try to make a simple function to turn frame visible it doesn't work nor does it error. However when I change the function to define a variable ( frame ) and then print frame.Visible It works perfectly and tells me whether or not the frame is visible.

Then after that I tried setting frame to visible after I print whether or not it is visible. After I set frame to Visible it still doesn't become visible so I print frame.Visible again and it tells me it is visible when it is very clearly not

This is the ModuleScript where the problem is happening in

local frame = game.StarterGui.QuestGUI.DialogueHolder.Choices
		
local NPCLines = {
	{"What's up kid?",0.01,nil},
	{"Those bandits from the outskirts are back giving the townspeople trouble again..",0.01,nil},
	{"Why dont you go show them who they're messing with",0.01,nil},
	{"They're probably carrying some cash too",0.01,nil},
	{"You up for it?",0.01,function()
		wait(0.1)
		print(frame.Visible)
		wait(1)
		frame.Visible = true
		print(frame.Visible)
		end},
	{"Good man!",0.01, nil},
}

return NPCLines

This is the local script where the dialogue is handled

local UIS = game:GetService('UserInputService')
--local playerservice = game:GetService('Players')
--local player = playerservice.PlayerAdded << Not needed in a local script
local player = game.Players.LocalPlayer
local char = player.CharacterAdded:Wait()
local hum = char:WaitForChild('Humanoid')
local isinrange = nil
local ischatting = false
local line = 1
local istalking = false
local dialogues = nil
--local hws = hum.Walkspeed

local function onInputBegan(input,gameProcessed)
	if input.UserInputType == Enum.UserInputType.Keyboard then
		local keyPressed = input.KeyCode
		if keyPressed == Enum.KeyCode.E then
			if isinrange ~= nil and not istalking then
				if ischatting == false then
					line = 1
					ischatting = true
					dialogues = require(isinrange.Lines)
					hum.WalkSpeed = 0
					script.Parent.DialogueHolder.Dialogue.Text = ""
					script.Parent.DialogueHolder:TweenPosition(UDim2.new(0.5,0,0.99,0),Enum.EasingDirection.Out,Enum.EasingStyle.Back,0.5,true)
					wait(0.5)
					local Cline = dialogues[line]
					istalking = true
					for i = 1,#Cline[1] do
						script.Parent.DialogueHolder.Dialogue.Text = string.sub(Cline[1],0,i)
						wait(Cline[2])
					end
					if Cline[3]then
						Cline[3]()
					end
					istalking = false
					line = line+1
				else
					local Cline = dialogues[line]
					if line > #dialogues then
						script.Parent.DialogueHolder:TweenPosition(UDim2.new(0.5,0,2,0),Enum.EasingDirection.Out,Enum.EasingStyle.Back,1.5,true)
						hum.WalkSpeed = 16
						dialogues = nil
						ischatting = false
					else
						local Cline = dialogues[line]
						istalking = true
						for i = 1,#Cline[1] do
							script.Parent.DialogueHolder.Dialogue.Text = string.sub(Cline[1],0,i)
							wait(Cline[2])
						end
						if Cline[3]then
							Cline[3]()
						end
						istalking = false
						line = line+1
					end
				end
			end
			
		end
	end
end

UIS.InputBegan:Connect(onInputBegan)

while true do
	wait()
	if ischatting == false then
		isinrange = nil
		for i,v in pairs(game.Workspace.QuestNPCs:GetChildren()) do
			if(char.HumanoidRootPart.Position-v.HumanoidRootPart.Position).magnitude <= 10 then
				isinrange = v
			end
		end
	end
end

UIS.InputBegan:Connect(onInputBegan)

I really don't know what to do at this point or where to even start.