Humanoid is not a valid member of Model? anyone know how to fix this?

I'm scripting from a youtube tutorial and I'm making a tower defense game and for some reason I have a error "Humanoid is not a valid member of model Workspace.Towers.Slinger? (also the error is on line 54)

(towers is my folder where I put my towers in and slinger is the towers name) does anyone know how to fix?

local ReplicatedStorage = game:GetService("ReplicatedStorage") local RunService = game:GetService("RunService") local UserInputService = game:GetService("UserInputService")

local towers = ReplicatedStorage:WaitForChild("Towers")

local camera = workspace.CurrentCamera local gui = script.Parent

local towerToSpawn = nil local function MouseRaycast(blacklist) local mousePosition = UserInputService:GetMouseLocation() local mouseRay = camera:ViewportPointToRay(mousePosition.X, mousePosition.Y) local raycastParams = RaycastParams.new()

raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
raycastParams.FilterDescendantsInstances = blacklist

local raycastResult = workspace:Raycast(mouseRay.Origin, mouseRay.Direction * 1000, raycastParams)


return raycastResult

end

local function AddPlaceholderTower(name)

local towerExists = towers:FindFirstChild(name)
if towerExists then
    towerToSpawn = towerExists:Clone()
    towerToSpawn.Parent = workspace.Towers
end

end

gui.Spawn.Activated:Connect(function() AddPlaceholderTower("Slinger") end)

UserInputService.InputBegan:Connect(function(input, processed) if processed then return end

if input.UserInputType == Enum.UserInputType.MouseButton1 then

end

end)

RunService.RenderStepped:Connect(function() if towerToSpawn then local result =MouseRaycast({towerToSpawn}) if result and result.Instance then local x = result.Position.X local y = result.Position.Y + towerToSpawn.Humanoid.HipHeight + (towerToSpawn.PrimaryPart.Size.Y / 2) local z = result.Position.Z

        local cframe = CFrame.new(x,y,z)
        towerToSpawn:SetPrimaryPartCFrame(cframe)
    end
end

end)