How do I properly use the new() method?

    local placementHandler = require(script:WaitForChild("PlacementModule"))

local base = workspace.Base

local items = game:GetService("ReplicatedStorage").items

local bee = base.Baseplate

local blee = base.ItemHolder

plane = placementHandler:new(bee, blee, 3)

  

local dummymodel

  

local function initiateplacement(itemname)

dummymodel = items[itemname]:clone()

for _, object in pairs(dummymodel:GetChildren()) do

if (object:IsA("BasePart")) then

object.CanCollide = false

end

end

dummymodel.Parent = workspace

plane:enable(dummymodel)

end

  

wait(3)

  

initiateplacement("Cash")

This is in a local script, and this is the error message attempt to call method 'new' (a nil value)