Dialog doesn't count as an element because it's directly used in the Windows.
To create a dialog, use this.
Window:Dialog({
Title = "Title",
Content = "This is a dialog",
Buttons = {
{
Title = "Confirm",
Callback = function()
print("Confirmed the dialog.")
end
}, {
Title = "Cancel",
Callback = function()
print("Cancelled the dialog.")
end
}
}
})