Issue while loading assets?

assets = {
    131194697, 284055952, 172732271
}
SpawnPosition = Vector3.new(0,0,0)
    wait(5)
    if #assets >= 1 then
    for i = 1, #assets do
        local newItem = game:GetService('InsertService'):LoadAsset(assets[i]):GetChildren()
        if #newItem >= 1 then
        for m = 1, #newItem do
        if newItem[m]:IsA("BasePart") then
            newItem[m].Parent = workspace
            newItem[m].Position = SpawnPosition
        elseif newItem[m]:IsA("Model") then
            newItem[m].Parent = workspace
            newItem[m]:MoveTo(SpawnPosition)
        else
            local model = Instance.new("Model", workspace)
            model.Name = newItem[m].Name
            newItem[m].Parent = model
            model:MoveTo(SpawnPosition) 
            end 
        end
        end
        end
    end

It was working before, but now it's not. Any ideas?

OUTPUT: 12:50:25.750 - Content failed because HTTP 403 (HTTP/1.1 403 Forbidden) 12:50:25.751 - HTTP 403 (HTTP/1.1 403 Forbidden)