Why is this function printing "Invalid parameter" when the parameter I give is a boolean?

I was trying to make a module script that I could use to control an intermission text bar.

This code is intended to change the visibility of the text bar:

function module.visible(bool)
    local intermissionGUI = script.Parent
    local intermissionText = intermissionGUI:WaitForChild("TextLabel")

    if bool == true then
        intermissionText.Visible = true
    elseif bool == false then
        intermissionText.Visibile = false
    else
        warn("Invalid parameter!")
    end
end

I tried running the visible() function using the following script:

local gui = require(game.ServerStorage:WaitForChild("InterGUI"))

gui:visible(false)

But the ModuleScript just prints out "Invalid parameter!"

Any help will be appreciated!