'Attempt to index a nil value' but nothing is nil?

I'm working on a system that runs a RemoteEvent when a gui button is pushed.

Here we have a simplified version of my script that should provide all non functioning details.

local rem = "!armspurchase"
local user = game.Players.LocalPlayer
local Armors = {"GoldArmor", "SteelArmor"}

for i = 1, #Armors do
	local Pass = user.PlayerGui.ScreenGui:findFirstChild(Armors[i].Name).TextButton
	Pass.MouseButton1Down:Connect(function()
		game:GetService("ReplicatedStorage"):FindFirstChild(rem):FireServer(user.Name, Armors[i].Name)
	end)
end

For some reason, even though everything is accounted for, it tells me that I'm trying to index a nil value on line 8???

Try to index the remote with a local. this can be:

local rem = game:GetService("ReplicatedStorage"):FindFirstChild("RemoteName")

after this you just need to fire the remote.

local rem = game:GetService("ReplicatedStorage"):FindFirstChild("RemoteName")
local Armors = {"GoldArmor", "SteelArmor"}
local Plr = game.Players.LocalPlayer

for i,v in pairs(Armors) do
	v.MouseButton1Click:Connect(function()
		rem:FireServer(Plr[v])
	end)
end

Test that out