Am I doing something wrong with this plugin script?

I was recently editing a plugin and it stopped creating the toolbar and button and stuff. I went back through the plugin and just made a simple script to create the toolbar, and the button, then when the button is clicked it make's a hint. I was wondering if I am doing anything wrong with this plugin script or if it's roblox. Any help appreciated.

Script:

-- Variables
local ToolbarName = "Test Plugins"
local PluginName = "Test Plugin 1"
local PluginDescription = "No description."
local Image = "http://www.roblox.com/asset/?id=109251559"

local Plugin = PluginManager():CreatePlugin()
local Toolbar = Plugin:CreateToolbar(ToolbarName)
local Button = Toolbar:CreateButton(PluginName,PluginDescription,Image)

-- Main Script
Button.Click:connect(function()
	local h = Instance.new("Hint",game:GetService("CoreGui"))
	h.Text = "Test plugin worked."
	wait(5)
	h:Destroy()
end)