TextButton not firing when pressed?

PS: If you are a complete beginner, I recommend that you study RemoteEvents and RemoteFunctions before reading this solution. I'm sorry if this code got too messed up.

This is because your script is being executed on the player's side, that is, your changes will not be made on the server in general.

You need to use a RemoteEvent to inform the server when your player clicks the button, and a Script on ServerScriptService that will perform this action.

In the TextButton.

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local RemoteEvent1 = ReplicatedStorage:WaitForChild("RemoteEvent1")
local RemoteEvent2 = ReplicatedStorage:WaitForChild("RemoteEvent2")

function parentPressed()
	RemoteEvent1:FireServer() -- To put the parts in Workspace.
	script.Parent.Text = "MidVoid: Enabled"
	script.Parent.BackgroundColor3 = Color3.fromRGB(116, 255, 65)
end

script.Parent.MouseButton1Down:connect(parentPressed)	 

if parentPressed() == true then
	function parentPressedAgain()
		script.Parent.Text = "MidVoid: Disabled"
		script.Parent.BackgroundColor3 = Color3.fromRGB(255, 57, 57)

		RemoteEvent2:FireServer() -- To make changes to the workspace.
	end
end

script.Parent.MouseButton1Down:connect(parentPressedAgain)

In a Script inside ServerScriptService.

The Script that serves the RemoteEvent1.

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local RemoteEvent1 = ReplicatedStorage:WaitForChild("RemoteEvent1")

RemoteEvent1.OnServerEvent:Connect(function()
	game.Lighting.Void1.Parent = workspace
	game.Lighting.Void2.Parent = workspace
end)
	

The Script that serves the RemoteEvent2.

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local RemoteEvent2 = ReplicatedStorage:WaitForChild("RemoteEvent2")

RemoteEvent2.OnServerEvent:Connect(function()
	game.Workspace.Void1.Parent = game.Lighting
	game.Workspace.Void2.Parent = game.Lighting
end)