Hello! I've been very confused of this :FireClient(). I've tryed it myself, and this is the code:
script.Parent.Touched:Connect(function(hit)
if hit.Parent:FindFirstChild("Humanoid") then
game.ReplicatedStorage.ShowCodeGUI:FireClient()
end
end)
After running and testing, I've got this error:
Argument 1 missing or nil
Need explanations please! Thank you.

1 comment
I have answered, you may look below at the answers.