Plugin Script won't work? [NOT COMPLICATED OR LONG] [PLEASE ANSWER]

msg = Instance.new("Message")
local plugin = PluginManager():CreatePlugin()
local toolbar = plugin:CreateToolbar("RBAN")
local button = toolbar:CreateButton(
    "RBAN",
    "RBAN", 
    "http://www.roblox.com/asset/?id=145329596" -- To use a decal, upload a decal to ROBLOX or find a decal that you want to use, and simply paste it here instead of using a file. 
)
button.Click:connect(function()
    msg.Parent = game.Workspace
    msg.Text = "RBAN Starting."
    wait(1)
    msg.Text = "RBAN Starting.."
    Wait(1)
    msg.Text = "RBAN Starting..."
    wait(2)
    msg:Destroy()
    wait(1)
function find() 
local child = game.Workspace:GetChildren() -- GetChildren() has a capital g. Before, it was lowercase.
for i=1, #child do 
if child[i].ClassName == "Script" then -- ClassName has a capital c. Before, it was lowercase.
child[i]:Destroy() -- remove() has been deprecated. Use Destroy() like you did earlier.
end
end
end
end)

Your GetChildren() needed a capital g, and your ClassName needed a capital c. To use a decal instead of a file for the icon, simply paste the roblox decal link into the string.