Can someone help me fix this output error?

This is my output:

08:45:57.971 -** Attempt to connect failed: Passed value is not a function** 08:45:57.974 - Script 'Workspace.Model.Muffin Button.Script', Line 55 08:45:57.975 - Stack End

After I click the top button, I get:

08:47:12.682 -** attempt to call a nil value** 08:47:12.684 - Disconnected event because of exception

So I've looked at the function name and calling it, I can't find the issue.

Please help/

local platform = script.Parent.Parent.Platform -- this is the Part we will move
local newPos = platform.Position + Vector3.new(0,20.09,0) -- the position the Part will go to
local Time = 5 -- the time that the script will take to move the part
local Increment = 0.1 -- the Part will move 0.5 studs each time it moves
local Debounce = false

up = false

local Diff = newPos - platform.Position -- the difference between the two positions
local Mag = Diff.magnitude -- the distance between the two parts
local Direction = CFrame.new(platform.Position, newPos).lookVector
local DownDirection = CFrame.new(platform.Position, newPos).lookVector

function MovePart() 
    if up == true then return false end
    wait(2)
    for n = 0, Mag, Increment do
        platform.CFrame = platform.CFrame +(Direction * Increment)
        wait( (Time/Mag) * Increment )
        up = true
    end
    wait(3)
    if up == true then 
    for n = 0, Mag, Increment do
        platform.CFrame = platform.CFrame -(Direction * Increment)
        wait( (Time/Mag) * Increment )
        up = false


function MovePart2() 
    if up == true then return false end

    for n = 0, Mag, Increment do
        platform.CFrame = platform.CFrame +(Direction * Increment)
        wait( (Time/Mag) * Increment )
        up = true
    end
    wait(3)
    if up == true then 
    for n = 0, Mag, Increment do
        platform.CFrame = platform.CFrame -(Direction * Increment)
        wait( (Time/Mag) * Increment )
        up = false

        end
    end

    end

        end
    end

    end
script.Parent.ClickDetector.MouseClick:connect(MovePart)
script.Parent.Parent.TopButton.ClickDetector.MouseClick:connect(MovePart2)