How to fix an error message if a ID is wrong that it displays a message?

The problem is you need to check the text every time you click the thing, also you need to check if the ID is a number.

Local Script:

local InsertService = game:GetService("InsertService") 
local remoteEvent = game:GetService("ReplicatedStorage"):WaitForChild("RemoteEvent")

script.Parent.MouseButton1Click:Connect(function()
    local ID = script.Parent.Parent.IdHolder.Text -- Gets the text
    if tonumber(ID) then --Checks if it is a number
        remoteEvent:FireServer(ID)
        script.Parent.Parent.Display.Text = "Success"
    else
        print("Not a number!")
    end
end)

Also another note, localscripts cant load assets, so you have to have a remote event in ReplicatedStorage and a script in ServerScriptService

Server Script:

game:GetService("ReplicatedStorage"):WaitForChild("RemoteEvent").OnServerEvent:Connect(function(ID)
    local Model = InsertService:LoadAsset(tonumber(ID))  -- Transforms text into a number
    local NewModel = Model:GetChildren()[1] 
    NewModel.Parent = workspace 
    Model:Destroy()
end)

And it should work!

If you want to learn more about remoteevents then go here: https://developer.roblox.com/en-us/articles/Remote-Functions-and-Events

I hope this helped you!