Map Chooser script not working saying that selectMap() needs to be defined??

I'm trying to make a map chooser for the minigame server I'm making and it says that the selectMap() at line 24 needs to be defined. I don't know what to do?!??!?

local replicatedStorage = game:GetService("ReplicatedStorage")
local maps = replicatedStorage:WaitForChild("Maps")

function pickMap()
    local mapList = maps:GetChildren()
    local selectedIndex = math.random(1,#maps) -- Choose a random number between 1, and the number of maps available.
    local map = mapList[selectedIndex]:Clone() -- Create a clone of the map we selected.
    map.Parent = workspace -- Parent it to the workspace.
    map.Name = "Map" -- Rename the map so that we can use the unloadMap() function later to remove it.
    return mapList[selectedIndex].Name -- Return the name of the map we selected, in case we want to display it.
end

function unloadMap()
    if workspace:FindFirstChild("Map") then
        workspace.Map:Destroy()
    end
end

local h = Instance.new("Hint",workspace)

while true do
    h.Text = "Picking new map..."
    wait(3)
    local mapName = selectMap()
    h.Text = "Selected map: "..mapName
    wait(3)
    h.Text = "Unloading map..."
    unloadMap()
    wait(3)
end