Player Gamepass teleport not working?

Hey im trying to make a script of a gui button

sudo `on button clicked

if player has game pass id 000000001

get player(player)
playerstage = player.leaderstats.stage

if workspace.stages.tostring(playerstage) then
teleport player to workspace.stages.tostring(playerstage)

else

show message "Whoa Hold up That stage hasnt loaded it please wait." `

else offer to buy game pass 00000001

heres what i have...

Gamepassid = 000000000



function Click(mouse)
player = game.Players.LocalPlayer.Name
if game:GetService("GamePassService"):PlayerHasPass(player, Gamepassid)then
    character = player.Character
    stage = tostring(player.Leaderstats.Steps.Value)
    stagepart = game.Workspace.Steps:FindFirstChild(stage)
    stagepos = stagepart.CFrame

    if game.Workspace.Steps:FindFirstChild(stage)== nil then
        msg = Instance.new("Hint")
        msg.Text = "Step still Loading Please try again in a few seconds" 

        else
        character.HumonoidRootPart.CFrame.Value = stagepos + CFrame.new(0,3,0)
    end

else
game:GetService("MarketplaceService"):PromptPurchase(player,Gamepassid)


end
end


script.Parent.MouseButton1Down:connect(Click)

the out out shows Unable to cast value to Object on line 7 ...

the whole script is probably wrong please help :(