Unable to cast value to Object?

I created this script to make that roblox purchase screen appear for those who do not have a GamePass and DO NOT appear for those who have it. The problem is that this error is showing "Unable to cast value to Object, on line 21" and the screen sells does not appear.

local Gamepass1 = workspace.LEVEL2_MAP.GamePasstouch


local Id1 = 2544515


local debounce = false
Gamepass1.Touched:Connect(function(t)
    if t.Parent:FindFirstChild('Humanoid') then
    if debounce == false then
        debounce = true
    local haspass = false
    local name = t.Parent.Name
    local b = game.Players:FindFirstChild(name)
        local success, message = pcall(function()
        haspass = game:GetService("MarketplaceService"):UserOwnsGamePassAsync(b.UserId, Id1)
    end)

    if haspass == false then
        print('stop')
            game:GetService("MarketplaceService"):PromptGamePassPurchase(b.UserId, Id1)

    elseif haspass == true then 
        print("go")
    end

    wait(0.5)
    debounce = false
    end
    end
end)