Unable to cast value to Object?

in a Script in ServerScriptStorage

It's supposed to fire to a client giving the name of the model so that the other script can clone the model from the name and place it.

local remotevents = game.ReplicatedStorage.RemoteEvents
local partplacer = remotevents.PartPlacer

partplacer.ShowPart.OnServerEvent:connect(function(plr,modelName)
    partplacer.ShowPart:FireClient(modelName)
end);

This is the client |v|

local model = game.ReplicatedStorage.Model
local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()

local PartPlacerModel = game.ReplicatedStorage.RemoteEvents.PartPlacer


local function updatePart(model)
    model:SetPrimaryPartCFrame(CFrame.new(math.floor(mouse.Hit.p.X),0.5,math.floor(mouse.Hit.p.Z)))
end;


mouse.KeyDown:connect(function(key)
    if key == "e" then
        PartPlacerModel.ShowPart:FireServer(model.Name)  -- Firing the ModelName 
    end;
end);

PartPlacerModel.ShowPart.OnClientEvent:connect(function(plr, modelName)
    local model = game.ReplicatedStorage:FindFirstChild(tostring(modelName))
    if model then
        local newModel = model:Clone()
        newModel.Parent = game.Workspace
        mouse.Move:connect(function()
            updatePart(newModel)    
        end);
    end;
end);